What is gravitational potential of a motionless 20kg rock that is 100m above the surface of the earth

How are engineers creating clothing that can charge your cell phone. Explain the science behind their innovation.

A student argues that Pluto cannot be a trans-Neptunian object because Pluto is a planet, and trans-Neptunían objects include only minor bodies in the solar system. Is the student correct? A. Yes.

A projectile travels in the horizontal direction at a velocity of 200.0 meters/second from a cliff that is 200.0 meters high. After how many seconds will the projectile reach the ground level? A. 4.2 seconds B. 6.2 seconds C. 6.4 seconds D. 9.

After Gru shrinks the moon are the side effects realistic to what would happen if the moon actually shrunk? Explain.

About 99% of the atmosphere is composed of a. argon and carbon dioxide. b. nitrogen and water vapor. c. oxygen and carbon dioxide. d. nitrogen and oxygen.

A conductor, with outer surface labelled a, contains a cavity, inner surface b. In this cavity there is a conducting sphere of radius r, and surface c. The sphere carries a charge of 1 C, while the conductor a charge of 2 C.

A spring (k = 790 N/m) has a length of 48 cm when zero net force is applied to it. What will its length be when 230 N of force is applied to stretch it? Question 3 options: 3.4 m 0.77 m 3.9 m 0.29 m

Inert gas used to make bright city lights True or False

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes