A puck with a mass m1 = 50 g moving at 1.0 m/s approaches a ...

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A puck with a mass m1 = 50 g moving at 1.0 m/s approaches a stationary puck with a mass m2 = 100 g on a frictionless air table,
 
  and they undergo a sudden two-dimensional elastic collision. After the collision, both pucks have identical speeds, but travel in different directions. What is the angle between the original and final paths of puck with mass m1?
  A) 30
  B) 60
  C) 90
  D) 120
  E) 150

Question 2

A vibrating diatomic molecule has vibrational quantum number n. The energy DIFFERENCE between adjacent energy levels
 
  A) is the same for all changes in n. B) decreases as n increases.
  C) is independent of n. D) increases as n increases.

[ally]

Answer to Question 1

C

Answer to Question 2

C

[FButt]

TYSM

[kishoreddi]

Gracias!