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Question1
A 70-g disk sits on a horizontally rotating turntable. The turntable makes 4 revolutions each second. The disk is placed 12cm from the axis of rotation of the turntable.
a. What is frictional force acting on the disk?
b. The disk will slide off turntable if it is located at a radius larger than 18 cm from the axis of rotation. What is the coefficient of static friction?
Question2
To store an energy produced in 1.0 hour by a 140 electric-power plant, how various cubic meters of water will have to be pumped from the lower to the upper reservoir? Suppose the upper reservoir is 470 above the lower and we can neglect the small change in depths within each. Water has a mass of 1000 for every.
A spinning flywheel has rotational inertia I = 401.0 kg · m2. Its angular velocity decreases from 20.4 rad/s to zero in 261.6 s due to friction
A large wooden turntable in the shape of a flat disk has a radius of 2.25m and a total mass of 135kg, Find the angular speed of the turntable after the parachutist lands
Rhea, one of Saturn's moons, has a radius of 765 km, Calculate its mass and average density
Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 83.7 N, Jill pulls with 91.9 N in the northeast direction, Find the magnitude of the net force the people exert on the donkey
Two speakers, one directly behind the other, are each generating a 295-Hz sound wave. What is the smallest separation distance between the speakers that would produce destructive interference at a listener standing in front of them? Take the speed..
A lens that has a focal length of 8.45 cm is used as a magnifying glass. (Take the near point of a normal eye to be 25 cm from the eye.) What is the angular magnification
Identical point charges of +3.6 ?C are fixed to diagonally opposite corners of a square. Find the sign and magnitude of the third charge
Three identical masses of 430 each are placed on the x axis. One mass is at = -14.0, one is at the origin, and one is at = 37.0.
question1a hollow spherical shell has mass 8.15 kg and radius 0.220 m. it is firstly at rest and then rotates about a
Predict the effect on concentration of SO3 as equilibrium is achieved by using Q, the reaction quotient. 2 SO3(g) 2 SO2(g) + O2(g
A storage tank 29 m high is filled with gasoline. (Assume the tank is open and exposed to the atmosphere at the top.), Find the gauge pressure at the bottom of the tank
question1a 100 kg of water in a closed insulated autoclave is heated from 20 to 90 degc by a heating coil made of 12 m
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