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A flywheel is a solid disk that rotates regarding an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a likely alternative to batteries in electric cars. The gasoline burned in a 250-mile trip in a typical midsize car produces about1.90*109 J of energy. How fast would a18-kg flywheel with a radius of0.36 m have to rotate to store this much energy? Give your answer in rev/min.
ocean waves with wavelength 1.2 m and period 1.5s are moving past a pier. a boy runs along the pier, how many wave crests pass the boy each second
question1itrsquos been a great day of new frictionless snow. julie starts at the top of the 60-degree slope. at the
A circlar metal disk of radius R rotates with angular velocity w about an axis through its center perpendicular to its face. find the emf induced between the center and the edges
A common flashlight bulb is rated at 0.300A and 2.70V ( the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature(20o C) is 1.80Ω, what is the temperature of the filament when the..
On an icy road, a 1600 kg car moving at 53 km/h strikes a 470 kg truck moving in the same direction at 27km/h. Find the speed of the wreckage
a hollow conducting sphere inner radius ra 18cm and outer radius rb24cm has a charge of -3.7n c is placed on the
An 7.17 kg block drops straight down from a height of 1.21 m, Find the maximum compression of the spring
An electron is projected with an initial speed 1.00×106 into the uniform field between the parallel plates. Suppose that field between the plates is uniform and fixed vertically downward, and that field outside the plates is zero. The electron enters..
q1. a 58.0-kg projectile is fired at an angle of 30.0deg above the horizontal with an initial speed of 1.26 102 ms from
Two round concentric metal wires lie on a tabletop, one inside the other. The inner wire has a diameter of 18.0cm and carries a clockwise current of 14.0 A, as viewed from above, and the outer wire has a diameter of 38.0cm .
A mass of 3kg, is sitting on a 34° incline and is connected by a massless string over a pulley in the shape of a hollow cylinder, estimate the acceleration of the system
An electron is released from rest at the negative plate between two 10.0 cm long parallel plates separated by 1.00 cm, What is the electron's velocity when it strikes the other plate
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