Physics question--what happens at the beginning of every roller coaster ride? (No obvious/joke answers)

Which of the following happens in the production of beta radiation?

Sam exerted an average force of 30 N to move a piano. how much work was required to moved the piano forward 6 m in 10 s

Marina has been onboard the research vessel Gustavo, off the coast of Chile, for several weeks now. She is measuring the depth of a very deep trench in the ocean that runs parallel to the coastline.

How does a roller coaster convert potential energy to kinetic energy and then back to potential energy again and again?

How will your equal-loudness curve change as you age?

A spherical balloon is filled with gas at a rate of 4 cm 3 / s. at what rate is the radius r changing with with respect to time when the volume v = 36 π cm 3?

A heavy box is in the back of a truck. the truck is accelerating to the right. apply your analysis to the box. a) draw a motion diagramb) draw a force identification diagramc) draw a free body diagram

A person is riding on a Ferris Wheel. When the wheel makes one complete turn, is the net work done by the gravitational force posiitive, negative, or zero?

A 0.299 kg mass slides on a frictionless floor with a speed of 1.44 m/s. The mass strikes and compresses a spring with a force constant of 44.9 N/m. How far does the mass travel after contacting the spring before it comes to rest?

The gravitational potential has a zero value gravitational field in the same place is? Maximum or null indeterminate