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A car is designed to get its energy from a rotating flywheelwith a radius of 1.50 m and a mass of475 kg. Before a trip, the flywheel isattached to an electric motor, which brings the flywheel'srotational speed up to 4000 rev/min.
(a) Find the kinetic energy stored in theflywheel.
(b) If the flywheel is to supply energy to the car as would a15.0-hp motor, find the length of timethe car could run before the flywheel would have to be brought backup to speed.
A gun shoots small plastic balls. The ball falls 1.2 m while traveling horizontally 5.1 m. Calculate the speed the ball leaves the gun
A Carnot engine operates between hot and cold reservoirs with temperatures 527 Degrees Celsius and -73 Degrees Celsius. how much heat is extracted per cycle from the hot reservoir
A newly discovered planet has a mean radius of 1350 km. A vehicle on the planet\'s surface is moving in the same direction as the planet\'s rotation, what is the period of the planet\'s rotation
Capacitors C1 = 3450 nF and C2 = 700 nF are initially connected in parallel and hold a combined charge of Qtoti = 783 nC. Find the total charge Qtotf and total energy stored in the final state
You desire to observe details of the Statue of Freedom, the sculpture by Thomas Crawford that is the crowning feature of the dome of the United States Capitol in Washington D.C. what focal length should the eyepiece have
The density of free electrons in gold is 5.90 × 1028 m-3. The resistivity of gold is at a temperature of 20°C and the temperature coefficient of resistivity is A gold wire, 1.1 mm in diameter and 29 cm long, carries a current of 650 mA. The drift ..
You need to make a series ac circuit having a resonance angular frequency of 1600 rad/s using a 148 ohm resistor, a 10.9 uf capacitor, and an inductor. What should be the inductance of the inductor
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.9 m/s^2 for a height 61.0 cm. How much time does he have to get out of its way before it returns to the height of the top of his head, a ..
A railway car moves past you at high speed. According to an observer riding on the railway car, a clock at the front of the car is synchronized with an identical clock at the rear of the car.
How much energy does a 100 watt light bulb use in 1 hour? Express your answer in joules Also find how much money it costs if electricity sells for 10 cents per kW-h.
The driver of an 1800 {kg} car travelling on a horizontal road at 100 kmh suddenly applies the brakes. Because of a slippery pavement, the friction of the road on the tires of the car, which is what slows down the car, is 20.0 percent of the weight o..
An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. How far does the lighter fragment slide
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