anonymous
  • anonymous
Which of the following is true concerning kinetic-molecular theory and heat transfer between relatively hotter Object A and relatively colder Object B? A. Molecules of Object A collide with those of Object B, and the molecules in Object B move faster. B. Molecules of Object A collide with those of Object B, and the molecules in Object B move at the same speed. C. Molecules of Object B collide with those of Object A, and the molecules in Object A move faster. D. Molecules of Object B collide with those of Object A, and the molecules in ObjectB move slower.
Physics
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SOLVED
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chestercat
  • chestercat
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Michele_Laino
  • Michele_Laino
the heat of a body is associated to the motion of its molecules. So, if the object A is colder than object B, then the kinetic energy of each molecule of the object B, is greter than the kinetic energy of each molecule of the object A
Michele_Laino
  • Michele_Laino
the transfer of heat is caused by collisions among molecules of the object A with molecules of the object B
anonymous
  • anonymous
ohh so but in this case, when object a is hotter than object b, does that mean the opposite? object A has greater kinetic energy than object B?

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Michele_Laino
  • Michele_Laino
so after that collisions, part of kinetic energy of each molecule of the object B, will be transferred to a corresponding molecule of the object A
Michele_Laino
  • Michele_Laino
yes!
Michele_Laino
  • Michele_Laino
nevertheless, in this case object A is colder than object B
anonymous
  • anonymous
yay!! but doesn't this problem say "relatively hotter object a and relative colder object b" ? :/
Michele_Laino
  • Michele_Laino
sorry, I have made an error. I thought that object A is relatively colder than object B
anonymous
  • anonymous
ohh okay no problem!! :D so in this case, what would the choice be? :/
Michele_Laino
  • Michele_Laino
then we can say this: so after that collisions, part of kinetic energy of each molecule of the object A, will be transferred to a corresponding molecule of the object B
anonymous
  • anonymous
so object a has more kinetic energy than object b, right? and ohh okay so this means Object A is colliding with object b?
Michele_Laino
  • Michele_Laino
yes! Object A has more kinetic energy ( which is called Internal Energy) than object B
anonymous
  • anonymous
okay, so would that mean the molecules in object b move more quickly? meaning choice A?
Michele_Laino
  • Michele_Laino
collisions are related to molecules of both objects, namely A and B. The heat transfer, goes from object A to object B
Michele_Laino
  • Michele_Laino
yes! The right option is the first one!
anonymous
  • anonymous
yay!! thank you!! :D
Michele_Laino
  • Michele_Laino
thank you!! :D

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