An object moves with a constant speed of 30 m/s on a circular ...

[rlane42]

An object moves with a constant speed of 30 m/s on a circular track of radius 150 m. What is the acceleration of the object?
 
  A) 0 m/s2
  B) 0.17 m/s2
  C) 5.0 m/s2
  D) 6.0 m/s2

Question 2

When light in air strikes the flat surface of a certain glass at 31.2 with the normal, the reflected ray is 100 percent polarized. What is the critical angle for the air-glass interface of this glass?
 
  A) 52.7 B) 21.4 C) 68.6 D) 58.8 E) 37.3

[swimkari]

Answer to Question 1

D

Answer to Question 2

E