A 1200 kg truck is moving to the right at a speed of 30 m/s. It hits another identical truck that was at rest. The two trucks stick together and move to the right at a speed of 15 m/s. Elastic: m1 v1B + m2 v2B = m1 v1A + m2 v2A Inelastic: mv1B + mv2B = (m1 + m2 ) Vf a. Is this an elastic or inelastic collidion b. What is the total momentum before the trucks collided with each other? c. What is the total momentum after the trucks collide with each other? Hint: be sure to add both masses then multiply by the velocity. d. Was momentum conserved and how do you know?

As shown in fig. p3.64, a closed, rigid tank fitted with a fine-wire electric resistor is filled with refrigerant 22, initially at 2108c, a quality of 80%, and a volume of 0.01 m3. a 12-volt battery provides a 5-amp current to the resistor for 5 minutes. if the final temperature of the refrigerant is 408c, determine the heat transfer, in kj, from the refrigerant.

An artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is 6.03 m/s^2. determine the orbital period of the satellite.

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)