If a water wave completes one cycle in 2 seconds, what is the period of the wave?

a. 0.5 seconds
b. 4 seconds
c. 2 seconds
d. 0.2 seconds

During a car accident, a 125kg driver is moving at 31m/s and in 1.5s is brought to rest by an inflating air bag. what is the magnitude of the change in momentum to the driver

Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.

Which insurance would contradict the big bang theory