A rocket ship in space is at rest relative to a rock floating in deep space. The rocket ship accelerates away from the rock at 3 m/s2, while it accelerates it
goes through a displacement of 108 m directly away from the rock. For what
amount of time did it accelerate? Hint: If a variable has the numerical value
zero, then you can substitute the value zero in for that variable before doing
the algebra to make the algebra much simpler.

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

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)

Most short-period comets do not have randomly oriented orbits because