Which branch of science involves the study of matter and energy?

a. chemistry

b. physics

c. biology

d. earth science

e. space science

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

A moving particle encounters an external electric field that decreases its kinetic energy from 9520 eV to 7060 eV as the particle moves from position A to position B. The electric potential at A is - 55.0 V, and the electric potential at B is + 27.

What is the mass of an object that requires a for of 30n to accelerate at a rate of 5m/sec

What type of organism would appear at the "bottom" of a food web

A school bus travels 15 kilometers in 0.75 hours. What is the speed of the school bus?

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.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite