The speed of light in a certain material is measured to be 2.2 ...

[jeatrice]

The speed of light in a certain material is measured to be 2.2  108 m/s. What is the index of refraction of this material? (c = 3.0  108 m/s)
 
  A) 1.1
  B) 1.2
  C) 1.4
  D) 1.6
  E) 1.8

Question 2

The equation of motion of a particle undergoing simple harmonic motion in the y direction is y = (2.0 cm) sin(0.60 s-1 t).
 
  At time t = 0.60 s determine the particle's (a) position, (b) velocity, and (c) acceleration.

[jgranad15]

Answer to Question 1

C

Answer to Question 2

(a) 0.70 cm (b) 1.1 cm/s (c) -0.25 cm/s2