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A bucket holding a cartoon character is dangling from a rope above a well from the windlass which raises the bucket from the well. The bucket and character have a combined mass of 10.0 kg. The distracted friend lets go of the handle, and the bucket falls, unwinding the windlass. The acceleration of the character and bucket is 4.9 m/s2. The windlass has a radius of 0.20 meters. What is the rotational inertia of the windlass?
In exercising, a weight lifter loses 0.123 kg of water through evaporation, the heat required to evaporate the water coming from the weight lifter's body. find the change in the internal energy of the weight lifter
It collides with a 10,000 kg railway car resting at the bottom of the track with its brakes off. The two cars couple together and roll up the track to a height of h. find out h.
Two spaceships approach Mars from the same direction. One has a speed of 0.2c, What is the speed of one spaceship relative to the other
A scaffold of mass 44 kg and length 6.0 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
A low-power laser used in a physics lab might have a power of 0.40 mW and a beam diameter of 2.6 mm. Calculate the average light intensity of the laser beam
An elevator cable can withstand a maximum tension of 19,500N before breaking. The elevator has a mass of 480 kg and a maximum acceleration of 2.24 m/s2. Engineering safety standards require that the cable tension never exceed two-thirds of the breaki..
A single slit forms a diffraction pattern, with the first minimum at an angle of 40.00 (degree) from central maximum, What is the wave length of this new light
Wavelengths of light from a remote galaxy are found to be 1.5 % longer than the corresponding wavelengths measured here on earth. What is the speed of the galaxy relative to earth
The starter motor of a car engine draws a current of 160A from the battery. The copper wire to the motor is 4.80mm in diameter and 1.2 m long. How much charge passes through the starter motor
Two violins are supposed to be playing concert A, at 440 Hz [{\rm Hz}], What beat frequency do the violinists hear
In a hydrogen atom, proton and electron are separated by 5.29×10?11m. What's the gravitational force between the two particles
A student ate a Thanksgiving dinner that totaled 3000Cal . He wants to use up all that energy by lifting a 30-kg mass a distance of 1.0 m. How many times must he lift the mass
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