a bucket of water with total mass 23kg is attached to a rope, which in turn is wound around a 0.050 m radius cylinder, with crank, at the top of a well. the moment of inertia of the cylinder and crank is 0.12 kgm².the bucket is raised to the top of the well and released to fall back into the well. what is the kinetic energy of the cylinder and crank at the instant the bucket is moving with a speed of 8.0 m/s?​

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c.what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?