Quickly must get it done for homework or into detention i go

how much is accomplished when two boys push a car a distance of 45 m with a force of 900 n? (give answer in joules)

a 53 kg student runs up a flight of stairs 5.5m high how much work (in joules) is done (you must first determine the weight of the student in newtons w=mxg)

a man applies a force of 60n in attempt to vove a desk 20m in spite of his effort, the desk refuses to budge how much work is accomplished

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)

Which graph represents motion with an object with positive velocity that is located at a position of 3 meters at a time of 0 seconds? a) a b) bb eliminate c) c d) d

Which sound characteristic is not affected by the relative motion of an object