A 23.8kg weight hangs at rest from a vertical spring, whose spring constant is ks=315N/m. how much does the sprint stretch (what is the magnitude of the displacement of the spring, d)? show work please!!

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little