Aperfectly elastic collision occurs between a 15.0-kg mass traveling at 3.50 m/s and a 9.00-kg mass traveling at 2.35 m/s. if the final velocity of the 9.00-kg mass is 2.80 m/s, what is the final velocity of the 15.0-kg mass?

What produces a record of seismic waves? richter scale seismogram barometer seismograph

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.