The critical angle for a substance in air is measured at 53.7. If ...

[brutforce]

The critical angle for a substance in air is measured at 53.7. If light enters this substance from air at 45.0 with the normal, at what angle with the normal will it continue to travel?
 
  A) 34.7 B) 53.7
  C) 45.0 D) It will not continue, but will be totally reflected.

Question 2

The International Space Station is orbiting at an altitude of about 370 km above the earth's surface. The mass of the earth is 5.97  1024 kg, the radius of the earth is 6.38  106 m, and G = 6.67  10-11 N  m2/kg2. Assume a circular orbit.
 
  (a) What is the period of the International Space Station's orbit? (b) What is the speed of the International Space Station in its orbit?

[TheNamesImani]

Answer to Question 1

A

Answer to Question 2

(a) 5.5 103 s (b) 7.7 103 m/s

[brutforce]

Both answers were spot on, thank you once again

[TheNamesImani]

Great! Please up vote