document_title: Atwood machine

question_text: what is a real world application of an atwood machine

text: Atwood machine

text: Equation for constant acceleration[edit]

text:
We are able to derive an equation for the acceleration by using force analysis. If we consider a massless, inextensible string and an ideal massless pulley, the only forces we have to consider are: tension force (T), and the weight of the two masses (W1 and W2). To find an acceleration we need to consider the forces affecting each individual mass. Using Newton's second law (with a sign convention of

m

1

>

m

2

{\displaystyle m_{1}>m_{2}}

) we can derive a system of equations for the acceleration (a).

text:
As a sign convention, we assume that a is positive when downward for

m

1

{\displaystyle m_{1}}

 and upward for

m

2

{\displaystyle m_{2}}

. Weight of

m

1

{\displaystyle m_{1}}

 and

m

2

{\displaystyle m_{2}}

 is simply

W

1

=

m

1

g

{\displaystyle W_{1}=m_{1}g}

 and

W

2

=

m

2

g

{\displaystyle W_{2}=m_{2}g}

 respectively.

text: Forces affecting m1:

text:
m

1

g
−
T
=

m

1

a

{\displaystyle \;m_{1}g-T=m_{1}a}

text: Forces affecting m2:

text:
T
−

m

2

g
=

m

2

a

{\displaystyle \;T-m_{2}g=m_{2}a}

text: and adding the two previous equations we obtain

text:
m

1

g
−

m

2

g
=

m

1

a
+

m

2

a

{\displaystyle \;m_{1}g-m_{2}g=m_{1}a+m_{2}a}

,

text: and our concluding formula for acceleration

text:
a
=
g

m

1

−

m

2

m

1

+

m

2

{\displaystyle a=g{m_{1}-m_{2} \over m_{1}+m_{2}}}

text:
Conversely, the acceleration due to gravity, g, can be found by timing the movement of the weights, and calculating a value for the uniform acceleration a:

a
=

2
d

t

2

{\displaystyle a={\frac {2d}{t^{2}}}}

.

text: The Atwood machine is sometimes used to illustrate the Lagrangian method of deriving equations of motion.[2]

text: Equation for tension[edit]

text: It can be useful to know an equation for the tension in the string. To evaluate tension, substitute the equation for acceleration in either of the 2 force equations.

text:
For example, substituting into

m

1

a
=

m

1

g
−
T

{\displaystyle m_{1}a=m_{1}g-T}

, results in

text:
T
=

2
g

m

1

m

2

m

1

+

m

2

=

2
g

1

/

m

1

+
1

/

m

2

{\displaystyle T={2gm_{1}m_{2} \over m_{1}+m_{2}}={2g \over 1/m_{1}+1/m_{2}}}

text: Equations for a pulley with inertia and friction[edit]

text: For very small mass differences between m1 and m2, the rotational inertia I of the pulley of radius r cannot be neglected. The angular acceleration of the pulley is given by the no-slip condition:

text:
α
=

a
r

,

{\displaystyle \alpha ={a \over r},}

text:
where

α

{\displaystyle \alpha }

 is the angular acceleration. The net torque is then:

text:
τ

n
e
t

=

(

T

1

−

T

2

)

r
−

τ

f
r
i
c
t
i
o
n

=
I
α

{\displaystyle \tau _{\mathrm {net} }=\left(T_{1}-T_{2}\right)r-\tau _{\mathrm {friction} }=I\alpha }

text: Combining with Newton's second law for the hanging masses, and solving for T1, T2, and a, we get:

text: Acceleration:

text: Tension in string segment nearest m1:

text: Tension in string segment nearest m2:

text: Should bearing friction be negligible (but not the inertia of the pulley and not the traction of the string on the pulley rim), these equations simplify as the following results:

text: Acceleration:

text: Tension in string segment nearest m1:

text: Tension in string segment nearest m2:

text: Practical implementations[edit]

text: Atwood's original illustrations show the main pulley's axle resting on the rims of another four wheels, to minimize friction forces from the bearings. Many historical implementations of the machine follow this design.

text: An elevator with a counterbalance approximates an ideal Atwood machine and thereby relieves the driving motor from the load of holding the elevator cab — it has to overcome only weight difference and inertia of the two masses. The same principle is used for funicular railways with two connected railway cars on inclined tracks, and for the elevators on the Eiffel Tower which counterbalance each other. Ski lifts are another example, where the gondolas move on a closed (continuous) pulley system up and down the mountain. The ski lift is similar to the counter-weighted elevator, but with a constraining force provided by the cable in the vertical dimension thereby achieving work in both the horizontal and vertical dimensions. Boat lifts [3] are another type of counter-weighted elevator system approximating an Atwood machine.


document_title: Tin Woodman

question_text: who wants a heart in the wizard of oz

question_tokens: who wants a heart in the wizard of oz

root

text: Tin Woodman

text: The books[edit]

text: Originally an ordinary man by the name of Nick Chopper (the name first appearing in The Marvelous Land of Oz), the Tin Woodman used to make his living chopping down trees in the forests of Oz, as his father had before him. The Wicked Witch of the East enchanted his axe to prevent him from marrying his sweetheart, after being bribed by the lazy old woman who kept the Munchkin maiden as a servant, and did not wish to lose her. (In a later book of the series, The Tin Woodman of Oz, the woman is said to be the Witch's servant, and it is the Witch herself who decides to enchant Nick's axe.) The enchanted axe chopped off his limbs, one by one. Each time he lost a limb, Ku-Klip the tinsmith replaced it with a prosthetic limb made of tin. Finally, nothing was left of him but tin. However, Ku-Klip neglected to replace his heart. Once Nick Chopper was made entirely of tin, he was no longer able to love the lady he had fallen for.

tag: p

text: In The Wonderful Wizard of Oz, Dorothy Gale befriends the Tin Woodman after they find him rusted in the forest, as he was caught in rain, and use his oil can to release him. He follows her to the Emerald City to get a heart from The Wizard. They are joined on their adventure by the Scarecrow and the Cowardly Lion. The Wizard sends Dorothy and her friends to the Winkie Country to kill the Wicked Witch of the West. The Tin Woodman's axe proves useful in this journey, both for chopping wood to create a bridge or raft as needed, and for chopping the heads off animals that threaten the party. When the Winged monkeys are sent by the Witch of the West against the group, they throw the Tin Woodman from a great height, damaging him badly. However Winkie Tinsmiths are able to repair him after the death of the Witch.

text: His desire for a heart notably contrasts with the Scarecrow's desire for brains, reflecting a common debate between the relative importance of the mind and the emotions. This occasions philosophical debate between the two friends as to why their own choices are superior; neither convinces the other, and Dorothy, listening, is unable to decide which one is right. Symbolically, because they remain with Dorothy throughout her quest, she is provided with both and need not select.[1] The Tin Woodman states unequivocally that he has neither heart nor brain, but cares nothing for the loss of his brain. Towards the end of the novel, though, Glinda praises his brain as not quite that of the Scarecrow's.

text: The Wizard turns out to be a "humbug" and can only provide a placebo heart made of silk and filled with sawdust. However, this is enough to please the Tin Woodman, who, with or without a heart, was all along the most tender and emotional of Dorothy's companions (just as the Scarecrow was the wisest and the Cowardly Lion the bravest). When he accidentally crushes an insect, he is grief-stricken and, ironically, claims that he must be careful about such things, while those with hearts do not need such care. This tenderness remains with him throughout the series, as in The Patchwork Girl of Oz, where he refuses to let a butterfly be maimed for the casting of a spell.[2]

text: When Dorothy returns home to her farm in Kansas, the Tin Woodman returns to the Winkie Country to rule as emperor. Later, he has his subjects construct a palace made entirely of tin — from the architecture all the way down to the flowers in the garden.

text: Baum emphasized that the Tin Woodman remains alive, in contrast to the windup mechanical man Tik-Tok Dorothy meets in a later book. Nick Chopper was not turned into a machine, but rather had his flesh body replaced by a metal one. Far from missing his original existence, the Tin Woodman is proud (perhaps too proud) of his untiring tin body.

text: A recurring problem for the Tin Woodman in The Wonderful Wizard of Oz and afterward was his tendency to rust when exposed to rain, tears, or other moisture. For this reason, in The Marvelous Land of Oz the character has himself nickel-plated before helping his friend the Scarecrow fight to regain his throne in the Emerald City. Even so, the Tin Woodman continues to worry about rusting throughout the Oz series.

text: This is inaccurate, in that tin does not rust; only iron does. This may reflect the usage where an object made of iron or steel but coated with tin (in order to prevent rusting) is called a "Tin" object, as a "tin bath", a "tin toy", or a "tin can"; thus, the Tin Woodman might be interpreted (in English, at least) as being made of steel with a tin veneer. One passage in The Road to Oz, by Baum himself, wherein the Woodman attends Ozma's birthday party accompanied by a Winkie band playing a song called "There's No Plate Like Tin," strongly implies that this is the case. Another explanation may be that the Woodman is chiefly made of tin, with iron joints; in some of the illustrations, his joints are a different color from the rest of his body.[3] In Alexander Volkov's Russian adaptation of The Wonderful Wizard of Oz, Volkov avoided this problem by the translation of "The Tin Woodman" as the "Iron Woodchopper".

text: The Tin Woodman appeared in most of the Oz books that followed. He is a major character in the comic page Baum wrote with Walt McDougall in 1904-05, Queer Visitors from the Marvelous Land of Oz. In Ozma of Oz, he commands Princess Ozma's army, and is briefly turned into a tin whistle. In Dorothy and the Wizard in Oz, he serves as defense counsel in the trial of Eureka. He affects the plot of a book most notably in The Patchwork Girl of Oz, in which he forbids the young hero from collecting the wing of a butterfly needed for a magical potion because his heart requires him to protect insects from cruelty. Baum also wrote a short book titled The Scarecrow and the Tin Woodman, part of the Little Wizard Stories of Oz series for younger readers.

text: In The Tin Woodman of Oz, Nick Chopper finally sets out to find his lost love, Nimmie Amee, but discovers that she has already married Chopfyt, a man constructed partly out of his own dismembered and discarded limbs. For the Tin Woodman, this encounter with his former fiancée is almost as jarring as his experiences being transformed into a tin owl, meeting another tin man, Captain Fyter, and conversing with his ill-tempered original head.

text: Baum's successors in writing the series tended to use the Tin Woodman as a minor character, still ruling the Winkie Country but not governing the stories' outcome. Two exceptions to this pattern are Ozoplaning with the Wizard of Oz, by Ruth Plumly Thompson, and Lucky Bucky in Oz, by John R. Neill. The biggest exception is in Rachel Cosgrove's The Hidden Valley of Oz, in which the Tin Woodman leads the forces in the defeat of Terp the Terrible and cuts down the Magic Muffin Tree that gives Terp his great size.

text: The fact that Nick includes the natural deaths of his parents in the story of how he came to be made of tin has been a major element of debate. In his eponymous novel, he proclaims that no one in Oz ever died as far back as Lurline's enchantment of the country, which occurred long before the arrival of any outsiders such as the Wizard. (It should be noted, however, that although the living creatures of Oz do not die of age or disease, they may die of accidents or be killed by others.)

text: The Tin Man in later fiction[edit]

text: In the 1998 novel The Tin Man, by Dale Brown, the eponymous protagonist is a power-armored vigilante whom the media and police have dubbed The Tin Man for his physical resemblance to the Wizard of Oz character.

text: The Tin Woodman is a minor character in author Gregory Maguire's 1995 revisionist novel Wicked: The Life and Times of the Wicked Witch of the West, its 2003 Broadway musical adaptation and Maguire's 2005 sequel Son of a Witch. In the book, Nessarose - the Wicked Witch of the East - is seen enchanting the axe to swing around and chop off Nick Chopper's limbs. She does this for a peasant woman who wishes to stop her servant, probably Nimmie Amee, from marrying Nick Chopper. This seems to be close to the Tin Man's origin in the original books, but from the Witch's perspective.

text: In the musical adaptation of Wicked the Tin Man is revealed to be Boq, a Munchkin whom Nessarose, the Wicked Witch of the East, fell in love with when they were at school together. When she discovered his heart belonged to Glinda, she botched a spell that was meant to make him fall in love with her by taking his heart, but instead shrunk his heart to nothing by taking it away without 'giving' it to Nessa. To save his life, Elphaba, the Wicked Witch of the West, was forced to turn him into tin. Not understanding her reasons, he pursues Elphaba with a single-minded vengeance for his current form. The Tin Man's humble origin in the novel conflicts with his having been the aristocratic Boq.

text: In Oz Squad, Nick was shown in a sexual relationship with "Rebecca Eastwitch" in order to get closer to Nimmie Amee and attempt to elope with her.

text: A darker twist to the beloved woodman is made by author James A. Owen in the fourth installment of his series, The Chronicles of the Imaginarium Geographica when his identity is revealed to be Roger Bacon.[4]

text: The Tin Woodman appears in the 2011 TV series Once Upon a Time episode "Where Bluebirds Fly" portrayed by Austin Obiajunwa (as a teenager) and by Alex Désert (as an adult).[5] In this version he goes by the name Stanum (derived from the Latin word "stannum", which means "tin").

text: Since youth, Stanum has been a woodcutter and one day when he first met Zelena, the daughter of another woodsman, he finds out that Zelena has magic and befriends her, regardless of whatever the children say about Zelena, who they see as a freak. Many years later, Stanum, now a man, is punished by the Wicked Witch of the North for chopping down a tree in her domain, and his body slowly begins to transform into tin. To prevent himself from completely becoming tin, Stanum seeks out help from Zelena (now the Wicked Witch of the West) at the Emerald City of Oz. Zelena agrees to help him seek out the Crimson Heart, which can save him. During their quest, Stanum tells Zelena that she doesn't have to be lonely but she is doing her best to deny his advice. Suddenly, a lion comes of nowhere to attack Stanum, and Zelena uses her magic to make the lion go away (at this point the lion has become as Zelena would put it, cowardly). When they finally arrived to the location of the Crimson Heart, the two learned that the only way to make it work is through the absorption of another person's magic. Unfortunately Zelena's actions and selfish greed for magic causes her to betray Stanum, whom she suspect was aligned with Dorothy by keeping the Crimson Heart for herself, leaving Stanum to transform into the Tin Man permanently. Some time later, when Robin Hood arrives in Oz in the episode "Heart of Gold", the Tin Man is seen on the side of the Yellow Brick Road, torn apart.

text: Depictions on stage and screen[edit]

text:
In 1902, Baum helped to adapt The Wizard of Oz into a wildly successful stage extravaganza. David C. Montgomery played the Tin Woodman, Niccolo Chopper (who played the piccolo), opposite Fred Stone as the Scarecrow, and the team became headliners. The piccolo would continue to appear in early adaptations, such as the 1910 film, but was largely forgotten, and the name "Niccolo" never appeared in one of the books. Revisionist books like Oz Squad have referred to him as "Nicholas," a name not found in the books, either.
In the classic 1939 film The Wizard of Oz, the Tin Man was played by actor Jack Haley. Originally, Ray Bolger was cast to play the role of Tin Man, despite his desire to play the Scarecrow. Buddy Ebsen was, at the time, cast as Scarecrow, and was convinced to swap roles with Bolger.[6] While this pleased Bolger, it led to medical problems for Ebsen. The Tin Man's makeup originally contained aluminum powder which got into Ebsen's lungs, bringing him to the edge of death. He was rushed to a hospital and had to give up the role. Despite this, and the fact that the Tin Man's makeup was changed to a safer aluminum paste, Ebsen went on to outlive both Bolger and Haley. Haley based his breathy speaking style in the movie on the voice he used for telling his son bedtime stories. His portrayal of the character is by far the most famous. There is no explanation in the film of how the Tin Man became the Tin Man. It is subtly implied that he was always made of tin; the only reference to the tinsmith is the Tin Man's remark "The tinsmith forgot to give me a heart". Unlike the costumes of the Scarecrow (in the National Museum of American History) and Cowardly Lion (two sets in private hands), that of the Tin Man "was largely destroyed".[7][8] Haley also portrayed the Tin Man's Kansas counterpart, Hickory (one of Aunt Em and Uncle Henry's farmworkers). Screenwriter Noel Langley created this character for the film.[9] Hickory helps Zeke (Lion's alter ego) lower a bed into its place on a wagon at the farm. Unlike Zeke, Hickory and Hunk (Scarecrow's alter ego) lose their hats with Uncle Henry as they struggle to open the cellar when the tornado approaches the farm. He reunites with Dorothy when she awakes from being unconscious. Hickory is seen with Aunt Em, Uncle Henry, Zeke, and Hunk as well as Professor Marvel (The Wizard's alter ego).
In the original Broadway version of The Wiz, Tiger Haynes played the Tinman, a human woodcutter who became tin after the Wicked Witch of the East cursed his axe to chop him up (as in the book). Nipsey Russell played the Tinman in the film adaptation of The Wiz. In this version, as in the 1939 movie, there is no explanation of how he became tin, just a reference of the "genius who created me". He worked as the carnival barker and when the park was closed, he was abandoned, rusted and squeezed by his fourth wife, "Teeny" (a heavy tin sculpture of a fat lady). He was saved by Dorothy and the Scarecrow. Ne-Yo played the Tinman in the TV special The Wiz Live!. This version portrayed him as a construction worker on whom the Wicked Witch of the East developed an unrequited crush. When she found out he already had a girlfriend, "Bertha", she became so jealous, she turned him into a heartless tinman. The Witch boasted afterwards that if she couldn't have his heart, then no one could. Like Jack Haley in the 1939 movie, Ne-Yo also played one of Aunt Em's farmhands - John, who walks with a metal leg brace.
Other notable actors who have played the Tin Woodman include Oliver Hardy in a 1925 silent version of The Wizard of Oz directed by and starring Larry Semon, in which a villainous farmhand briefly fell into a tin pile and emerged as a "Tin Woodsman" [sic]. In subsequent scenes the tin was removed and he became "Knight of the Garter". In the 1960 television adaptation of The Land of Oz, he was played by vaudeville comedian Gil Lamb; in the 1969 film, The Wonderful Land of Oz he was played by Al Joseph; and in the 1985 film Return to Oz, he was played by Deep Roy, a little person who was able to fit inside a costume that looked nearly identical to John R. Neill's artwork.
In the 1961 animated TV series, Tales of the Wizard of Oz and its sequel, the 1964 NBC animated television special Return to Oz, the Tin Man (here named Rusty) was voiced by Larry D. Mann.
In the 1970s, the Tin Woodman appeared in a series of short animated educational films about heart health from Joleron Productions.
In an episode of The World's Greatest Super Friends, Superman temporarily became the Tin Man after a tornado took him, Wonder Woman, and Aquaman to Mister Mxyzptlk's planet of Oz.
In a 1981 episode of Scooby-Doo and Scrappy-Doo, Scrappy is dressed as the Tin Man after a tornado took him, Shaggy, and Scooby to "Ahz", a direct spoof of Oz with a different spelling by its enunciation.
In 1985, the Tin Woodman appeared in the educational film Act on Arthritis as well as in promotional commercials.
Roger Daltrey portrayed this character in the 1995 television stage performance The Wizard of Oz in Concert: Dreams Come True. The Kansas farmworker Hickory does not appear in this production. Daltrey performed a rock and roll tempo of "If I Only Had a Heart" in which he swung his microphone mimicking his Who persona. He also performed the bridge verses sung by the Tin Man in Nathan Lane's long version of "If I Only Had the Nerve". Toward the end, he hugged the Wizard (Joel Grey) saying to him "Thank you from the bottom of my heart!".
In 1996, they made a cartoon animated The Oz Kids. He has a son named Tin Boy. Like his father he can cut wood with his ax. And he has to be careful with water and snow or he'll be rust. His voice played by Andy Milder.
Hiroki Tsujiai from Ultra Maniac dresses as the Tin Man in the costume party.
James Kall portrayed the Tin Man in the 2001 ABC miniseries Life with Judy Garland: Me and My Shadows.
The Muppet Gonzo plays a similar role, the Tin Thing, in 2005's television film The Muppets' Wizard of Oz. In this version, he is the Wicked Witch's research assistant, transformed into a robot to prevent him wanting a day off to marry Camilla. Gonzo's other role is himself. He appears at the end of this film in the Muppets' show.
In 2006, the Tin Man was the protagonist in a pair of television commercials for Chef Boyardee brand canned Beef Ravioli, in a costume identical to the design used in the 1939 Oz film. In the commercials, the Tin Man (played by Australian actor David Somerville) is pursued by groups of children due to the fact that an oversized Beef Ravioli can label has been affixed to the back of his cylindrical torso (which he doesn't notice until the midpoint of the first commercial); thus, he appears to be a very large, mobile can of ravioli. In the first ad, the Tin Man escapes from his pursuers only to discover that the building he ducked into is an elementary school cafeteria full of hungry children and a teacher. The second ad begins with the Tin Man running through a residential neighborhood, accidentally adding to his pursuers when he stumbles across a backyard birthday party; after fleeing across a golf course (while dodging balls from the driving range), he is cornered in another backyard and threatened with a garden hose (playing on the Tin Man's classic weakness of rusting). As the scene shifts to the image of a Beef Ravioli can, sounds of water hitting metal and the Tin Man's cries for help are heard.
In 2006, the Chicago Under Ground Film Festival premiered Lee Lynch’s feature film titled Transposition of the Great Vessels. Based on the story of his own parents, who moved from Redding to Los Angeles, in hopes of making a better life. His father wanted to work for the forest service, and his mother wanted to be a cook, but their baby was born with a rare heart condition. They were forced to give up those dreams, and make choices that would give them insurance and stability. A naturalist movie interspersed with dream sequences; the “Tin Woodman” makes an appearance while on his deathbed, at UCLA Medical Center.
At Sundance of 2007, a film premiered by young director Ray Tintori entitled Death to the Tinman. It is a somewhat modernized retelling that takes place at sometime in the 1900s, in the town Verton, rather than Oz. However, the book of the same name, which tells the origins of the character, is cited by opening intertitles as the source. Although the basic premise is nearly identical, much of the details and all names and locations have been changed. This is partially due to the film's satirical look at criminal reenactments, as it states at the beginning that names "have been changed to protect the innocent." Perhaps the most interesting change that story makes, though, is the origin of the curse upon the Tinman's Axe, which is changed from being the Witch to being a curse from God. This film won a short filmmaking award at Sundance.
A 2007 CG animated short film called "After Oz",[10] produced by the film students at Vancouver Film School, centered on a stylized version of the Tin Man, after he has received his heart from Oz. The movie shows him moving through a colorful Oz city with his brand-new mechanical heart, before meeting a reddish female Tin Woman (or robot?) to whom he gives the heart. She proceeds to cruelly play with the heart.
An internet-collaboration, CG animated feature based on Baum's book The Tin Woodman of Oz was produced by A:M Films, and completed in 2009.
In 2010, Whitestone Motion Pictures[11] produced a 23-minute live-action short film, Heartless: The Story of the Tin Man. The film is based on the book The Tin Woodman of Oz, where Woot the Wanderer visits the Tin Man and asks how he came to be made of tin. In the film, the Tin Man appears to be more steam- or coal-powered. His chest cavity is covered by a door which reads "Pedudoe Tin Co." but this is a reference to the workings of the film company, and not a reference to any Oz book or material. The movie was made available for free viewing online and free downloading of its soundtrack.
In the 2013 prequel, Oz the Great and Powerful, although the Tin Woodman does not physically appear, the film introduces his creator, the Master Tinker, portrayed by Bill Cobbs.[12]
Tin Man appears in the animated film Legends of Oz: Dorothy's Return (which is based on Dorothy of Oz), voiced by Kelsey Grammer.
The Woodsman, a 2012 stage play written by James Ortiz with music by Edward W. Hardy, tells the backstory of the Tin Man, using puppetry, movement, and music. The play has received multiple Off Broadway productions, and won a 2016 Obie Award for Ortiz's puppet design.[13]
In the TV series Emerald City, the Tin Woodman equivalent is Jack (Gerran Howell), a friend of the enigmatic Tip, who helps 'him' escape from his imprisonment by a witch. When it is revealed that Tip is actually a girl whose true identity was suppressed by a potion, her strained emotional state causes her to push Jack over a balcony after he kisses her. Jack is subsequently found and rebuilt by scientists in a cyborg-like state; his head and right arm are still organic, but his heart and the rest of his body has been replaced or covered by mechanical armour.
The Tin Man appears in Once Upon a Time. In this show, he started out as a woodcutter named Stanum (portrayed by Austin Obiajunwa as a young man and by Alex Désert as an adult) who encountered a younger Zelena when she saved a bird's nest. When two bullies show up to harm Zelena, Stanum helped to fend them off. Years later, Stanum comes to Zelena for help. He tells Zelena that he is slowly turning to tin after he was cursed by the Wicked Witch of the North for cutting down a tree in her area. Stanum states that the Crimson Heart artifact might be able to help him, but needs Zelena's help to get by the beast that guards it. When close to its location, Stanum is attacked by a lion who is then fended off by Zelena. When they get to the heart, Zelena picks it up and felt some of her magic draining. When Zelena claims that Dorothy Gale put Stanum up to this task, Stanum commented that he never met Dorothy. He also stated that Zelena once claimed on the day they met that she would be happy being a normal human. As Stanum fully turns to tin and is unable to move, Zelena takes the box containing the Crystal Heart and leaves while telling Stanum that perhaps Dorothy will meet Stanum and free him.

tag: ul

text: Modern works[edit]

text: This article gives self-sourcing examples without describing their significance in the context of the article. Please help improve this article by adding citations to reliable sources that describe the examples' significance, and by removing less pertinent examples. Unsourced or poorly sourced material may be challenged or removed. (November 2017) (Learn how and when to remove this template message)

tag: table

text:
The song "Country Robot/A Letter to Dorothy" by The Incredible Moses Leroy is written from the Tin Man's perspective; it includes the lyrics "You gave me oil, I was a rusty load/ You even helped me find my heart."
In the song "Tin Man" by the band America, the lyrics state that "Oz never did give nothin' to the Tin Man, that he didn't, didn't already have." The rest of the song has nothing to do with the Tin Man or Oz.
Country artist Kenny Chesney recorded the song "Tin Man" for his album "All I Need to Know". The first verse and refrain state:
Tracy Chapman included a song titled "Remember the Tinman" on her 1995 album New Beginning.
In the VeggieTales episode The Wonderful Wizard of Ha's, the Tin Man and his Kansas counterpart from the 1939 film were played by Larry the Cucumber.
In the 2007 Sci-Fi miniseries Tin Man, a "Tin Man" is a term used for the law enforcers of Central City in the Outer Zone (O.Z.) One of the story's protagonists, Wyatt Cain (played by Neal McDonough in the title role), is a Tin Man whose past left him hardened and distant from others. In addition, he is first found by Dorothy imprisoned in an iron suit that replays a non-stop loop of the capture of his wife and child.
The Avett Brothers 2009 Album I and Love and You features a song called "Tin Man".
Verses of the Future Islands 2010 post-pop, synth-ballad Tin Man contain numerous metaphorical, Tin-Man related references. The song also features a powerful and climactic end chorus consisting solely of the repeated line - "I am the Tin Man".
In the 2011 direct-to-DVD animated film Tom and Jerry and the Wizard of Oz, the Tin Man was voiced by Rob Paulsen.
The Tin Man appears in Dorothy and the Witches of Oz played by Jordan Turnage. He appears in the form of a man named Nick (played by Billy Boyd).
A 1990 episode of Star Trek: The Next Generation is titled "Tin Man."
The Phineas & Ferb episode "Wizard of Odd" features the Tin Man in his rusted state, but he is never freed from this condition. He is also featured in an end credits song entitled "Rusted."
Mickey Mouse Clubhouse did a parody special entitled "The Wizard of Dizz," in which the role of the Tin Man is played by Mickey Mouse.
The parody The Muppets' Wizard of Oz featured Gonzo the Great in the role of the Tin Man.
In the game Code Name: S.T.E.A.M., Tin Man, along with other Oz characters, is a playable character. His design is more based on Japanese culture and he have the ability to give steam to allies.
The Tin Woodman appears as a major antagonist in Danielle Paige's Dorothy Must Die novel series. In this series, Dorothy and her friends have been corrupted by Dorothy's use of magic and the 'magic' in the gifts they received from the Wizard, with the Tin Woodman now driven by a twisted 'love' for Dorothy that is nevertheless unrequited. He is described as possessing a more twisted appearance, with his legs compared to horses' legs and his hands possessing knives for fingers. At the conclusion of the first novel, series protagonist Amy Gumm cuts out his heart, having been informed by the Wizard that she must take the gifts of Dorothy's companions to kill Dorothy herself.

text: Sources of the Tin Man image[edit]

text: Economics and history professors have published scholarly studies that indicate the images and characters used by Baum and Denslow closely resembled political images that were well known in the 1890s.[14] They state that Baum and Denslow did not simply invent the Lion, Tin Woodman, Scarecrow, Yellow Brick Road, Silver Slippers, cyclone, monkeys, Emerald City, little people, Uncle Henry, passenger balloons, witches and the wizard. These were all common themes in the editorial cartoons of the previous decade. The notion of a "Tin Man" has deep roots in European and American history, according to Green (2006), and often appeared in cartoons of the 1880s and 1890s.[15] Baum and Denslow, like most writers and illustrators, used the materials at hand that they knew best. They built a story around them, added Dorothy, and added a series of lessons to the effect that everyone possesses the resources they need (such as brains, a heart and courage) if only they had self-confidence. The Wonderful Wizard of Oz was a children’s book, of course, but as Baum warned in the preface, it was a "modernized" fairy tale as well.

text: The Tin Man—the human turned into a machine—was a common feature in political cartoons and in advertisements in the 1890s. Indeed, he had been part of European folk art for 300 years. In political interpretations of The Wonderful Wizard of Oz, the Tin Woodman is supposedly described as a worker, dehumanized by industrialization. The Tin Woodman little by little lost his natural body and had it replaced by metal; so he has lost his heart and cannot move without the help of farmers (represented by the Scarecrow); in reality he has a strong sense of cooperation and love, which needs only an infusion of self-confidence to be awakened. In the 1890s many argued that to secure a political revolution a coalition of Farmers and Workers was needed.[16]

text: The 1890 editorial cartoon to the right shows President Benjamin Harrison wearing improvised tin armor because he wanted a tariff on tin. Such images support the argument that the figure of a "tin man" was in use as political allegory in the 1890s. The man on the right is politician James G. Blaine.

text: The oil needed by the Tin Woodman had a political dimension at the time because Rockefeller's Standard Oil Company stood accused of being a monopoly (and in fact was later found guilty by the Supreme Court). In the 1902 stage adaptation, which is full of topical references that do not appear either in the novel or in any of the film adaptations (unless they are satirical), the Tin Woodman wonders what he would do if he ran out of oil. "You wouldn't be as badly off as John D. Rockefeller," the Scarecrow responds, "He'd lose six thousand dollars a minute if that happened."[17]


document_title: Rigor mortis

question_text: what are the importance of rigor mortis in meat processing

text: Rigor mortis

text: Physiology[edit]

text: After death, respiration in an organism ceases, depleting the source of oxygen used in the making of adenosine triphosphate (ATP). ATP is required to cause separation of the actin-myosin cross-bridges during relaxation of muscle.[2] When oxygen is no longer present, the body may continue to produce ATP via anaerobic glycolysis. When the body's glycogen is depleted, the ATP concentration diminishes, and the body enters rigor mortis because it is unable to break those bridges.[3]

text: Additionally, calcium enters the cytosol after death. Calcium is released into the cytosol due to the deterioration of the sarcoplasmic reticulum. Also, the breakdown of the sarcolemma causes additional calcium to enter the cytosol. The calcium activates the formation of actin-myosin cross-bridging. Once calcium is introduced into the cytosol, it binds to the troponin of thin filaments, which causes the troponin-tropomyosin complex to change shape and allow the myosin heads to bind to the active sites of actin proteins.[1] In rigor mortis myosin heads continue binding with the active sites of actin proteins via adenosine diphosphate (ADP), and the muscle is unable to relax until further enzyme activity degrades the complex.[2]

text: Normal relaxation would occur by replacing ADP with ATP, which would destabilize the myosin-actin bond and break the cross-bridge.[1] However, as ATP is absent, there must be a breakdown of muscle tissue by enzymes (endogenous or bacterial) during decomposition. As part of the process of decomposition, the myosin heads are degraded by the enzymes, allowing the muscle contraction to release and the body to relax.[4][5] Decomposition of the myofilaments occurs 48 to 60 hours after the peak of rigor mortis, which occurs approximately 13 hours after death.[1]

text: Physical changes[edit]

text: At the time of death, a condition called "primary flaccidity" occurs. Following this, the muscles stiffen in rigor mortis. All muscles in the body are affected. Starting between two and six hours following death, rigor mortis begins with the eyelids, neck, and jaw. The sequence may be due to different lactic acid levels among different muscles, which is directly related to the difference in glycogen levels and different types of muscle fibers.

text: Rigor mortis then spreads to the other muscles, including the internal organs, within the next four to six hours. The onset of rigor mortis is affected by the individual's age, sex, physical condition, and muscular build. Rigor mortis may not be perceivable in many infant and child corpses due to their smaller muscle mass.[6]

text: Applications in meat industry[edit]

text: Rigor mortis is very important in meat technology. The onset of rigor mortis and its resolution partially determine the tenderness of meat. If the post-slaughter meat is immediately chilled to 15 °C (59 °F), a phenomenon known as cold shortening occurs, whereby the muscle sarcomeres shrink to a third of their original length.

text: Cold shortening is caused by the release of stored calcium ions from the sarcoplasmic reticulum of muscle fibers, in response to the cold stimulus. The calcium ions trigger powerful muscle contraction aided by ATP molecules. To prevent cold shortening, a process known as electrical stimulation is carried out, especially in beef carcasses, immediately after slaughter and skinning. In this process, the carcass is stimulated with alternating current, causing it to contract and relax, which depletes the ATP reserve from the carcass and prevents cold shortening.[7]

text: Application in forensic pathology[edit]

text: The degree of rigor mortis may be used in forensic pathology, to determine the approximate time of death. A dead body holds its position as rigor mortis sets in. If the body is moved after death, but before rigor mortis begins, forensic techniques such as livor mortis can be applied.  If the position in which a body is found does not match the location where it is found (for example, if it is flat on its back with one arm sticking straight up), that could mean someone moved it.

text: Several factors also affect the progression of rigor mortis, and investigators take these into account when estimating the time of death. One such factor is the ambient temperature. When conditions are warm, the onset and pace of rigor mortis are sped up by providing a conducive environment for the metabolic processes that cause decay.  Low temperatures, however, slow them down. Therefore, for a person who dies outside in frozen conditions rigor mortis may last several days more than normal, so investigators may have to abandon it as a tool for determining time of death.[8][9]