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A flywheel is a solid disk that rotates about 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 possible alternative to batteries in electric cars. The gasoline burned in a 142-mile trip in a typical midsize car produces about 4.28 x 109 J of energy. How fast would a 31.1-kg flywheel with a radius of 0.487 m have to rotate to store this much energy? Give your answer in rev/min.
a hoop of mass M=2 kg and radius R=0.4 m rolls without slipping down a hill. what is the speed Vfinal at the bottom of the hill
A 3 kg object sitting at the top of the track shown is given an initial velocity of 4 m/s. How far does the object travel after passing point C
A light wave is in normal incidence on a diamond crystal, (a) What is the reflectivity? (b) What is the ratio of the electric field in the reflected wave to that in the incident wave? (c) What percentage of the intensity of the incident wave is trans..
A capacitor is constructed of two 5.3 m2 parallel metal plates separated by an air gap of 0.010 mm. An electric potential of 25 V is applied to the capacitor. calculate the capacitance of the structure
The coefficient of static friction is .6 and the ladder makes a 50 degree angle with the ground. Elucidate how far up the ladder can an 800 newton person climb before starts to slip
The vertical displacement of particles in a string (when a wave is propagating through it) is given by y = (0.02) sin[(10?)t - (8?)x], where everything is measured in standard units, meters and seconds. What is the amplitude of the wave?
A panicular spring has a spring constant of 86 N/m and a mass of 0.548 kg at its end. When the spring is driven in a viscous medium, the resonant motion occurs at an angular frequency of 12.2 rad/s.
A 1.83 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.442 and the coefficient of kinetic friction is 0.240. How much force is needed to begin moving the book
The isotope ^(99)Tc* is commonly used in several different types of medical imaging procedures. find the change in the nuclear mass after emission of the gamma ray
You may also assume that v_0 gg sqrt{2gL}, so that the change in hammer's gravitational potential energy, as it drives the nail into the block, is insignificant.
A particle of mass m is subjected to a force acting in the x-direction, Fx = (2.77 + 0.351x) N. Find the work done by the force as the particle moves from x = 0 to x = 4.41 m
An electric motor rotating a workshop grinding wheel at the rate of 106 rev/min is switched off. Assume the wheel has a stable negative angular acceleration of magnitude 1.50 rad/s2.
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