Jose buys a new moped. He travels 3km south and then 4km east. He then decides to drive back 3 km north and 7km east. What distance did he cover? What was his displacement?

What are the applications of electromagnetic waves

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.

Why do astronauts in the space shuttle weigh less?