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Hydroelectric power plants convert gravitational potential energy into more useful forms with flowing water downhill during a turbine system to generate electric energy. The Hoover Dam on the Colorado River is 211 m high and generates 4.00 x109 kW · h/y. At what rate should water bellowing during the turbines to generate this power? The density of water is 1.00 kg/L. Suppose a total efficiency of 97.5 percent in converting the water's potential energy into electrical energy.
A brick of mass M has been placed on a rubber cushion of mass m. Together they are sliding to the right at constant velocity on an ice-covered parking lot.
a 18.0-kg cannonball is fired from a cannon with muzzle speed of850msat an angle of33.0degwith the horizontal. a second
you charge an initially uncharged 88.9-mf capacitor through a 23.7nbspomega resistor by means of a 9.00-v battery
Two uniform solid spheres have the same mass of 2.15 kg, but one has a radius of 0.213 m while the other has a radius of 0.867 m. What is the corresponding value of F for the larger sphere
question1an unstable nucleus of mass 3.4 10-26 kg initially at rest at an origin of a coordinate system disintegrates
question a neucleus undergoes radioactive decay emitting a gamma raywhich of the following is true?a. the daughter
The electron in a hydrogen atom is in a subshell with maximum angular momentum quantum number l=6. What is the number of states in this subshell
A skier of mass 65.0 kg is racing down a giant slolam course. She starts at the top of the top of the course at rest. Over the course of her run, Calculate the force of kinetic friction over her run
An ideal gas expands at a constant pressure of 2.9 atm from 435 mL to 709 mL. Heat then flows out of the gas, determine the total heat flow into the gas
Radiation from the Sun reaching Earth (just outside the atmosphere) has an intensity of 1400 W/m2. What would the intensity be at Mercury
a contestant in a winter games event pushes a 31 kg block of ice across a frozen lake. the coefficient of static friction is 0.1, Calculate minimum Force he must exert to get moving back
Two physical pendulums (not simple pendulums) are made from meter sticks that are suspended from the ceiling at one end. Determine the period of the metal pendulum
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