A vertical cylinder, closed at the bottom end, contains 0.0100 ...

[ishan]

A vertical cylinder, closed at the bottom end, contains 0.0100 mol of ideal gas. It is fitted at the top with a piston that can move freely.
 
  The mass of the piston is 14.0 kg and the initial height of the piston above the bottom of the cylinder is 25 cm. What is the temperature of the gas? (R = 8.31 J/mol  K)
  A) 290 K
  B) 413 K
  C) 3620 K
  D) 405 K
  E) 500 K

Question 2

The center of mass (or center of gravity) of a two-particle system is at the origin. One particle is located at (3.0 m, 0.0 m) and has a mass of 2.0 kg. The other particle has a mass of 3.0 kg. What is the location of the 3.0-kg particle?
 
  A) (-3.0 m, 0.0 m)
  B) (-2.0 m, 0.0 m)
  C) (2.0 m, 0.0 m)
  D) (3.0 m, 0.0 m)

[Kjones0604]

Answer to Question 1

B

Answer to Question 2

B