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The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 117 kgand radius R = 80 cm.The engine rotates the wheel at 540 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad is applied at the edge to provide a radially inward force F = 130 N. If the coefficient of kinetic friction between the pad and the flywheel is µk = 0.2,how many revolutions does the flywheel make before coming to rest?
How long does it take for the flywheel to come to rest?
Calculate the work done by the torque during this time.
Two ideal gases have the same mass density and the same absolute pressure. One of the gases is helium (He), What is the temperature of the neon
A lens with a focal length of 60cm is sitting 90cm in front of a lens of focal length 40cm. where is the final image formed
The vertical displacement of particles in a string (when a wave is propagating through it) is given by y = (0.02) sin[(10?)t %u2013 (8?)x], What is the amplitude, wavelength, and speed of the wave
There are four charges, each with a magnitude of 1.8 μC.Two are positive and two are negative. The charges are fixedat corners of a 0.25 m square, one to a corner, in such a way thatthe net force on any charge is directed toward the center of thes..
Consider a systen of N non-interacting particles for which the energy of each particle can assume two and only two distinct values: 0 and E (E>0). Find the entropy of the system
when an ac source is connected across a 15.0 omega resistor the rms current in the resistor is 7.10 a.a find the rms
If the principal quantum number n were limited to the range from 1 to 5, how many elements would we find in nature
A transformer has 390 turns in the primary coil and 230 in the secondary coil. What kind of transformer is this, By what factor does it change the current
if two equal charges are separated by a certain distance the force of repulsion is f. given f1 if each charge in f1 is
How long must a 0.60-mm-diameter copper wire be to carrya 0.50 {\rm A} current when connectedto the terminals of a 1.5 {\rm V} flashligh tbattery? What is the current if the wire is half the length inpart A?
You are standing on a sheet of ice that covers the football stadium parking lot in Buffalo; there is negligible friction between your feet and the ice. If you catch the ball, with what speed do you and the ball move afterwards
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 39.1 J, What is the kinetic energy of the system at the equilibrium point
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