An ore cart of mass 1200 kg is rolling at a speed of 10.8 m/s across a flat surface. A crane dumps ore into the cart from directly above it, after which the cart travels at 9.3 m/s. Whet mass of ore did the armed to the cart? Assume that frictional forces with the flat surface are negligible.
190 kg
92 kg
110 kg
240 kg

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)

Apiece of metal 75g at 110°c is dropped in a container with 500g at 20°c. the h2o if temperature is 24°c find specific heat capacity of metal