A toy roller coaster is at the top of a 2 m hill and has a mass of 9660 grams. The coaster (at this moment) has energy. Calculate it.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.