What is the pressure exerted by a boy

weighing 80kg on the ground when he stands

on his feet whose area is 200cm2?

A. 80 pa

B. 1600 pa

C. 40,000 pa

D. 400 pa

How could you increase the gravitational potential energy between yourself and Earth?

A wave has a wavelength of 5mm and a frequency of 10 hertz what is its speed? answer: units:

In a particular crash test, an automobile of mass 1692 kg collides with a wall and bounces back off the wall. The x components of the initial and final speeds of the automobile are 20 m/s and 3 m/s, respectively. If the collision lasts for 0.

What Compounding frequency refer to?

A skydiver jumps out of a plane. How fast would he be falling after 5 seconds? (ignore air resistance)

A liquid filled sealed system has cylinders with movable pistons on each end. The face of one piston has an area of 5 cm². The other piston has an area of 500 cm² and is supporting a weight of 2 kN on it.

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

A cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's top speed in m/s?

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N