26 What must change when a body is accelerating? ...

A 0.145-kg baseball is pitched at 42 m/s. the batter hits it horizontally to the pitcher at 58 m/s. find the change in momentum of the ball.

A green light is submerged 2.90 m beneath the surface of a liquid with an index of refraction 1.35. What is the radius of the circle from which light escapes from the liquid into the air above the surface?

What gas was present in earth's earliest atmosphere and used by cyanobacteria during photosynthesis? A. oxygen B. carbon dioxide C. nitrogen D. methane

Which has greater speed, a heron that travels 600 m in 60 seconds or a duck that travels 60 m in 5 seconds? explain

A coal-fired plant generates 600 MW of electric power. The plant uses 4.8 * 106 kg of coal each day. The heat produced by the combustion of coal is 3.3 * 107 J/kg.

ll of mass m is thrown vertically upward with an initial speed of v0. It experiences a force of air resistance given by F = - kv, where k is a positive constant. The positive direction for all vector quantities is upward.

When combing your hair, you scuff electrons from your hair onto the comb. is your hair then positively or negatively charged? how about the comb?

A 4 kg mass is in free fall. What is the velocity of the mass after 11 seconds

Pascal's principle explains the viscosity of motor oil used in cars. True or False?

A (n) ... is a material that takes in a wave when the wave hits it