The flying boom b is used with a crane to position construction materials in coves and underhangs. the horizontal balance of the boom is controlled by a 250-kg block d

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

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.

What is a subatomic particle with a negative charge and very little mass?