A solid sphere, solid cylinder, and a hollow pipe all have equal ...

[newyorker26]

A solid sphere, solid cylinder, and a hollow pipe all have equal masses and radii. If the three are released simultaneously at the top of an inclined plane, and roll without slipping which will reach the bottom first?
 
  A)
 
  sphere
  B)
 
  pipe
  C)
 
  cylinder
  D)
 
  they all reach bottom in the same time
  E)
 
  It depends on the angle of inclination.

Question 2

A parallel-plate capacitor stores a charge Q = 4.00 nC when connected to a battery of voltage V = 10.0 V. The energy density is then u = 3.62  10-4 J/m3. What is the surface area of the plates?
 
  A)
 
  0.0250 m2
  B)
 
  0.0500 m2
  C)
 
  0.0923 m2
  D)
 
  0.0387 m2
  E)
 
  0.0103 m2

[jharrington11]

Answer to Question 1

A

Answer to Question 2

B

[newyorker26]

TYSM

[lindahyatt42]

Excellent