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A 15.0-m length of hose is wound around a reel, which is originally at rest. The moment of inertia of the reel is 0.440kg· m2, and its radius is 0.160 m. When turning, friction at the axle exerts a torque of magnitude 3.40 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 assume that the hose unwinds without slipping.
A 76 kg window cleaner uses a 13 kg ladder that is 5.0 m long. He places one end on the ground 3.0 m from a wall, What is the angle of this force on the ladder
Calculate the mass of the sun from the radius of the earth's orbit (1.50×1011 m), the earth's period in its orbit, and the gravitational constant G, What is the density of the sun
A block is being pulled by a rope with a force of 24 N. The rope has an angle of theta=20 degrees from the horizontal. The block moves a distance of 11 m. Elucidate what is the work done?
A 5.06 10-5 H solenoid is constructed by wrapping 63 turns of wire around a cylinder with a cross-sectional area of 9.70 10-4 m2 , Determine the change in the length of the solenoid
An accelerometer in a control system consists of a 3.65-g object sliding on a horizontal rail. Find the force constant required for the spring
Select all true statements about electromagnetic waves.
A large arm model was constructed with a free arm which weights 1 kg, an additional weight of 1 kg is supported by the arm at a distance of 12 cm from the pivot. What is the total torque of the resistance
An automobile tire is inflated with air originally at 20.0°C and normal atmospheric pressure. During the process, the air is compressed to 25.0% of its original volume and the temperature is increased to 35.0°C. (a) What is the tire pressure? (b) Aft..
A resistance R and a 3-H inductance are in series across a 60-Hz ac voltage. What is the ac input voltage
The maximum possible efficiency of a heat engine which exhaust its heat at a temperature of 42.0o is 44.0 percent. What is the minimum value of the temperature
A typical lightning flash delivers about 30C of negative charge from cloud to ground. How many electrons are involved
Clifford is in a real hurry, however, and skips the speed ramp. Starting from rest with an acceleration of 0.49 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. What is the speed at which belt of the ramp is moving.
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