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

What kind of front occurs when a cold air mass replaces a warm air mass?

How can large solar power plants affect the environment?

A 4.5 kg pelican is gliding due east while a small force of air resistance is acting on the bird in the opposite direction. If the net force acting on the bird is 1.2 N to the west, what is the bird's acceleration?

Describe another plant or animal in which you can observe wave motion

an object is traveling along with a velocity of 1.1 m/s. What is the mass if a forces of 8.9 N applied for a time period of 6.5 s accelerates it to a velocity of 13.2 m/s?

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?

A wave has a wave length of 2 m and a frequency of 500 Hz, what is its speed?

Can anything block a magnet's force feild?