Some students fire a rocket of mass 0.150kg into the air. If at the top of it's flight it has a gravitational potential energy of 150J, What height did it reach?

Why is the law of gravity an example of a universal law? a Gravity is the attraction of any mass to any other mass. b Gravity is a force that affects everyone on Earth. c Gravity is the reason the Earth revolves around the sun.

Which indicates that a chemical reaction has occurred? A. a broken egg sinks after its has been sitting out for several days. B. you smell gasoline when you remove the cap on a gas tank. C. an unripe orange on a tree doesn't smell at all

A toy truck has a speed of 4 m/s and kinetic energy of 48 J. What is its mass? A. 8 kg B. 4 kg C. 6 kg D. 10 kg

Atomic nuclei of almost all elements consist of

The density of water is 1 g/cc. Ice floats on water with 90% of its volume inside the water. What will be the mass of a cube of ice of side 3 cm?

A boulder with a mass of 2,500 kg rests on a ledge 200m above the ground. What is the boulder's GPE

When and if Galileo dropped two balls of the same size but different masses from the top of the Leaning Tower of Pisa, air resistance was not really negligible. Which ball actually struck the ground first?

Which activity is an example of a chemical change? a. sugar dissolving in water b. water evaporating into water wapor c. lighting a match d. freezing water

Microwaves are electromagnetic waves used in broadcasting and telecommunications. when do these waves increase in frequency?

In which of the following situations is the greatest amount of work accomplished? A boy lifts a 9-newton box 0.3 meters. A boy lifts a 4-newton box 0.6 meters. A boy lifts a 6-newton box 0.3 meters. A boy lifts a 2-newton box 0.6 meters.