Joe leans against a lamp-post with a force of 200 n. the lamp-post does not move. how much work is done by the car? explain your answer. work done = force (n) x distance (m)

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.

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.