Aproton (mass 1 u) moving at 5.40 x 106 m/s collides elastically and head‐on with a second particle moving in the opposite direction at 1.00 x 106 m/s. after the collision, the proton is moving opposite to its initial direction at 5.60 x 106 m/s. find the final velocity (in m/s) of the second particle. [take the proton’s initial velocity to be in the positive direction.]

Marvin records scientific data about lake superior. for which property has marvin forgotten to use an si unit of measurement? shore length high temperature low temperature annual precipitation

Which planet do you think would be easiest for humans to colonize some day?

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)