What is the correct displacement for the following vectors : 4 km south ,2km north , 5 km south , and 5 km north

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

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.

The solid that is formed and usually sinks to the bottom of a solution is the