As a gift, you receive a Hot Wheels track along with a speed booster that is .0025 m long. You set up your track and push the toy car and give it a velocity of 22.5 m/s to enter the speed booster. It travels the length of the speed booster
and then exists with a velocity of 37,4 m/s. Calculate the cars acceleration, assuming the speed booster accelerated
the toy car uniformly.

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

The energy released by a nuclear fusion reaction is produced when

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)