An industrial fabrication process stamps out thin metal pieces, ...

[jrubin]

An industrial fabrication process stamps out thin metal pieces, each in the shape of a square with a circular hole in the middle, from a large thin sheet. These pieces are mounted in a large machine.
 
  As these pieces heat up during regular machine operation, the diameter of the circular hole will A) decrease.
  B) stay the same.
  C) increase.
  D) behave unpredictably causing the machine to malfunction.

Question 2

A figure skater is spinning slowly with arms outstretched. She brings her arms in close to her body and her moment of inertia decreases by 1/2. By what factor does her rotational kinetic energy change?
 
  A) 2
  B) 4
  C)
  D) 1/2
  E) It doesn't change.

[nekcihc358]

Answer to Question 1

C

Answer to Question 2

A

[jrubin]

Thanks for the timely response, appreciate it

[alvinum]

Great answer, keep it coming