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A flywheel comprises a uniform circular disk with a mass of 101.0 kg and a radius of 1.1 m. It rotates with an angular velocity of 1183 rev/min. A constant tangential force is applied at a radial distance of 0.8 m. What energy must this force dissipate to stop the wheel? If the wheel is brought to rest in 117.0 s, what is the tangential force? How many revolutions does the flywheel make while it is stopping in time 117.0 s?
A steel wire of length 1.97 with circular cross section must stretch no more than 0.260 when a tensile (stretching) force of 400 is applied to each end of the wire. What is the minimum diameter necessary.
A beam of nuclei is used for cancer therapy. Each nucleus has an energy of 108 MeV, How many nuclei are in the beam
A person lifts a 5kg cement block a vertical distance of 2.3m and after that aeries the block horizontally a distance of 6m. Determine the work completed by the person and by the force of gravity in this process.
A converging lens with two convex surfaces has a front surface with radius of curvature of 11.3 cm; What is the focal length of the lens
A current of 18.0 mA is maintained in a single circular loop of 2.20 m circumference. A magnetic field of 0.690 T is directed parallel to the plane of the loop. Calculate the magnetic moment of the loop.
question1. nbspgravity you shouldnrsquot need a calculator for these problems a sum up the universal law of gravitation
Which of these systems are made of identical particles? Explain
Human skin is most sensitive to ultraviolet light of approximate wavelength 300 nm. The threshold for sunburn occurs when 1 cm2 of skin absorbs about 1015 of these UV photons over an interval of several hours or less. How much energy is absorbed
The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 2.7 x 105 N/C. What is the total charge in coulombs on the drum
determine the downward force of the rails on the car when the upside-down car is at the top of the loop
Blood is conductive enough that it can be treated as a moving conductor. what is the magnitude of the voltage that is measured with the electrodes in the drawing
A rocket of total mass 3180 kg is traveling in outer space with a velocity of 115 m/s toward the Sun. how much mass must be expelled
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