When a water wave runs into you at the beach, what causes you to get knocked down?

A. The wave's energy

B. Air molecules in front of the wave

C. Periodic motion

D. Friction

Instantanuos speed vs. constant speed

A sprinter is advised to reduced his speed slowly after completing his race. why

A rock falls 30 m. Its KE before it strikes the ground is 4,392 J. What is the mass of the rock? A. 15 kg B. 146 kg C. 1.5 kg D. 3.0 kg

An open train car, with a mass of 2130 kg, coasts along a horizontal track at the speed 2.93 m/s. The car passes under a loading chute and, as it does so, gravel falls vertically into it for 3.03 s at the rate of 465 kg/s.

The spring in a toy rocket launcher has a spring constant of 80 N/m. How far must you compress the spring to cause it to exert a force of 2 N

Wind is the driving force behind which type of current? A. surface B. convection C. deep - water D. El Nino

If a neutral atom has 44 protons in its nucleus, the number of surrounding electrons is: a. less than 44 b. 44 c. more than 44 d. unknown

What is the closest planet to earth that scientist think can support life?

Which force is most directly responsible for radioactive beta decay? electromagnetic force strong interaction gravitational interactions weak interaction

Momentum is a measure of the of an object. Which term accurately completes the sentence?