Agrain barge travels on a river from point a to point b loading and unloading grain. the barge travels at a rate of 99 mph relative to the water. the river flows downstream at a rate of 1 mph. if the trip upstream takes 2 hours longer than the tripâ downstream, how far is it from point a to pointâ b?

What is the temperature in degrees celsius of a substance with a tempature of 49k

J. j. thomson’s experiment disproved the theory that an atom

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)