Which statement will be true if you increase the frequency of a periodic wave?
a. the number of waves per second will increase
b. the time taken to increase one cycle will increase
c. the amplitude will increase
d. there will be no change in period

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

The mantle is made up of which structural zones?

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.