A 5 kg rock is raised 28 m above the ground level. What is the change in its potential energy?

Name a radioactive gas that is released from the ground

A ray of light traveling in air strikes the surface of a liquid. if the angle of incidence is 31.7◦ and the angle of refraction is 21.3◦, find the critical angle for light traveling from the liquid back into the air. answer in units of ◦.

Henry heavyweight weighs 1450 n and stands on a pair of bathroom scales so that one scale reads twice as much as the other.

The type of radioactive decay in which the mass number and atomic number remain unchanged is A) beta radiation. B) alpha radiation. C) positron radiation. D) gamma radiation.

If volume decreases in a gas, what happens to pressure? Pressure increases and then decreases. Pressure increases. Pressure decreases. Pressure stays the same.

2. How is temperature related to kinetic energy?

As stream velocity decrease, which factor will likely increase? A) erosion of the stream bank B) deposition of material in the stream C) amount of material carried downstream D) size of the particles carried downstream

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?