When U-239 emits a beta particle, the resulting nucleus has A) ...

[RODY.ELKHALIL]

When U-239 emits a beta particle, the resulting nucleus has
 
  A) 90 protons.
  B) 91 protons.
  C) 92 protons.
  D) 93 protons.
  E) 94 protons.

Question 2

A 50.0-kg block is being pulled up a 16.0 slope by a force of 250 N which is parallel to the slope. The coefficient of kinetic friction between the block and the slope is 0.200. What is the acceleration of the block?
 
  A) 0.528 m/s2
  B) 0.158 m/s2
  C) 0.412 m/s2
  D) 0.983 m/s2
  E) 0.260 m/s2

[kjohnson]

Answer to Question 1

Answer: D

Answer to Question 2

C