Which of the following accurately describes the role of potential energy in the hydroelectric dam? a. Potential energy is almost non-existent due to water resting in the reservoir.

b. There is no potential energy due to a lack of gravity.

c. Potential energy exists as moving water.

d. Potential energy exists due to gravity.

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?