if a rock has a speed of 12 m/s as it hits the ground, from what height did it fall assuming the speed was zero. its mass is 50 kg

What was the first state to secede from the union?

A sound wave is made of a series of compressions and a. extensions. c. rarefactions. b. volumes. d. refractions.

How does a boulder change

Newton's Second Law of Motion is represented by the equation, F=ma, which shows the relationship of force, mass, and acceleration.

The largest diversity of plants and animals on the planet is found in one terrestrial biome. True or false

An automobile travels on a straight road for 25 km at 32 km/h. it then continues in the same direction for another 25 km at 64 km/h.

Why is it important for engineers to design bumper cars safely

What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.