9. What refers to the number of waves that passes through given point at a particular time?
a. Amplitude
b. Frequency
c. Peroid
d. Wavelength
10. The following are examples of mechanical waves, EXCEPT
a. Longitudinal
b. Surface
c. Sound
d. X—ray
11. Marky is doing an experiment. He throws a piece of a stone in a pond.Does he observed a wave?
a. Yes,he observes that when stone touches water it moves back and forth
b. Yes, he observes that when the stone touches the water,circular ripples are formed
c. No, he observes that when stone hits water it does not produce wave.
d. No,he does not observes wave when the stone touches water
12. What type of wave moves in circular motion relative to the direction of the wave motion?
a. Electromagnetic
b. Mechanical
c. Surface
d. Transverse
