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The 100-mm-radius brake drum is attached to a flywheel which is not shown. The drum and flywheel together have a mass of 300 kg and a radius of gyration of 600 mm. The coefficient of kinetic friction between the brake band and the drum is 0.30. Knowing that a force P of magnitude 50 N is applied at A when the angular velocity is 180 rpm counterclockwise, determine the time required to stop the flywheel when a = 200 mm and b = 160mm.
q1. metal rod is 41.126 long at 23.0 and 41.149 long at 46.4 calculate the average coefficient of linear expansion of
You connect a number of identical light bulbs to a flash-light battery. a) What happens to the brightness of each bulb as more bulbs are added to the circuit if you connect them (i) in series and (ii) in parallel?
bernoullis equation only yields perfect predictions if the following conditions existi- the liquid is inviscid that is
a horizontal beam of electrons travels from north to south in a discharge tube where the earth has a downward component
what is the resolving power of a microscope (lamda = 550 nm) with a 5-mm-diameter objective which has focal point of= 9mm
Take the mass of the earth to be 5.974x1024 kg, the mass of the sun to be 1.989x1030 kg, What is the gravitational force of the sun on the earth
A photoelectron produced by ionization in a photoelectron spectrometer is ejected with a velocity of 861 km s-1. Calculate the de Broglie wavelength (in Å) of the electron
A solid uniform sphere and a uniform spherical shell, both having the same mass and radius, How fast is each sphere moving when it reaches the bottom of the hill
The receiver has a 22 yard lead from the quarter back by the time he throws the ball. How fast must he run in order to catch the ball when it lands
A paper airplane is given a push so that it could fly 7m/s 35° North of East, How fast could it go and in what direction would it travel
A 0.2-kg ball is bounced against a wall. It hits the wall with a speed of 20 m/s at a 10 degree angle and rebounds elastically at a 10 degree angle
In the game of darts, the player stands with feet behind a line2.36 m from a dartboard, with the bull's-eye at eye level. Supposeyou lean across the line, release a dart at eye level 1.74 m from the board, and hit the bullseye.
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