John has an object suspended in the air. it has a mass of 50 kilograms and is 50 meters above the ground. calculate the objects potential energy

What is the best description of the constructive interference of light A. Two waves have a displacement in opposite directions B. Two waves have the same direction of displacement. C. A mechanical wave meets an electromagnetic wave. D.

What is meant by the term friction?

With the piston head locked in place, will the volume of the gas increase, decrease, or stay the same whenthe piston is placed above the flameThe volume increases. The volume decreases. The volume stays the same

What happens when a rock is physically or chemically changed?

How many types of electrical charges exists

How are mass and weight different? a. Mass is the space an object takes up and weight is the effect of gravity on mass. b. Mass is the amount of matter and weight is the effect of gravity on mass. c.

What were the discoveries of astronomers like Copernicus and Galileo?

A major obstacle to developing good human relations is that

4.) An apartment building is on fire and a guy is trapped on the fire escape ladder. There is a dumpster that is 6.3m away and is filled full of trash, and he is 7m above it.

Calculate the temperature of and power-per-area radiated from a blackbody if the spectral intensity density peaks at (a) gamma rays, λ = 1.50*10-14 m; (b) x rays, 1.50 nm; (c) red light, 640 nm; (d) broadcast television waves, 1.