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A 17.0-m length of hose is wound around a reel, which is originally at rest. The moment of inertia of the reel is 0.490kg·m2, and its radius is 0.160 m. When turning, friction at the axle exerts a torque of magnitude 3.20 N·mon the reel. If the hose is pulled so that the tension in it remains a constant 25.0 N, how long does it take to totally unwind the hose from the reel? Neglect the mass of the hose, and suppose that the hose unwinds without slipping.
a flat surface having an area of 3.6 m2 is rotated in a uniform electric field of magnitude e 6.3 x 105 nc. determine
a device with a resistance of 200.0k is connected to a 10v battery. how much power does the device use?a 0.050 mwb 0.50
Alkaid and Merak are 25.6 ? apart in the earth's sky. Find the distance in light years from Alkaid to Merak
A laser that produces a spot of light that is 1.25 mm in diameter is shone perpendicularly on the center of a thin, what is the power of the laser
You throw a 1 kg rock down a 5m-deep wishing well. It hits the water with a velocity of 7.5 m/s. How much work did air resistance do
The point of the needle of a sewing machine moves in SHM along the x-axis with a frequency of 2.5 Hz. Find the acceleration component of the needle at t=0
question a spacecraft descends vertically near the surface of planet x. an upward thrust of 25.0 kn from its engines
A small plastic ball of mass 5.27 x 10-3 kg and charge +0.118C is suspended from an insulating thread and hangs between the plates of a capacitor, What is the magnitude of the charge on each plate
How far will it coast before starting to roll back down. In addition, snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find the acceleration of the sled and child.
A certain solid-propellant model rocket engine releases a total of 6000 J as it burns. what fraction of the chemical energy released by the engine is wasted in the form of thermal energy in the air
the cycle for a heat engine that uses a gas having ? =1.25. The initial temperature is T1=300K, What is the power output of the engine
On a frozen pond, a 11.6 kg sled is given a kick that impartsto it an initial speed of vo = 2.15 m/s. find the distance the sled moves before coming to rest
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