During a reaction, 1.7 10-4 J of energy is released. What change ...

[crobinson2013]

During a reaction, 1.7  10-4 J of energy is released. What change of mass would cause this?
 
  A) 5.1  10-4 kg
  B) 4.3  10-11 kg
  C) 1.5  10-13 kg
  D) 4.8  10-18 kg
  E) 1.9  10-21 kg

Question 2

The moment of inertia of a solid cylinder about its axis is given by 0.5MR2. If this cylinder rolls without slipping, the ratio of its rotational kinetic energy to its translational kinetic energy is
 
  A) 1:2
  B) 1:3
  C) 2:1
  D) 1:1
  E) 3:1

[brbarasa]

Answer to Question 1

E

Answer to Question 2

A

[crobinson2013]

TYSM

[upturnedfurball]

Excellent