Aneighbor kid is doing a science fair project about the conservation of energy. he is rolling a basketball down a ramp to show that mgh = 1/2mv^2. however, every time the experiment is run, the results show that mgh does not equal 1/2mv^2. however, if a second identical upward ramp is added, the ball very nearly goes back to its original height (so virtually no energy is being lost. perplexed, your (knowing you are taking physics) asks you what is wrong. what is your response?

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)

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n