A radio station broadcasts at 80 MHz. How long does it take for ...

[chads108]

A radio station broadcasts at 80 MHz. How long does it take for this radio signal to travel a distance of 20  106 m?
 
  A) 0.15  10-2 s
  B) 15 ms
  C) 6.7  10-2 s
  D) 20 ms
  E) 25 ms

Question 2

A car is moving in a circular path. At a certain instant, it has zero tangential acceleration and a non-zero centripetal acceleration. What is the car doing at that instant?
 
  What will be an ideal response?

[flexer1n1]

Answer to Question 1

C

Answer to Question 2

It is moving with a non-zero velocity and zero instantaneous angular acceleration.