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A frictionless pulley in the shape of a solid cylinder of mass , M=3kg and radius R=0.4, is used to draw water from a well. A bucket of mass, m=2kg, is attached to a cord wrapped around the cylinddr. If the bucket starts from rest at the top of the well and falls for 3 s before hitting the water, how far did it fall?
an electron and a proton are separately placed at rest midway between two oppositely charged metal plates. which
The tension in a string is 20.6 n and its linear density is .649 kg/m. A wave on the string travels in the -x direction. It has amplitude of 3.71 cm and a frequency of 10.6 hz. What are the speed and wavelength of wave.
An electric fan is running on HIGH. After fan has been running for 1.0 minutes, the LOW button is pushed. What was the initial angular speed of the fan in rev/sec
The masses of the earth and moon are 5.98*1024 and 7.35*1022 kg, respectively. Identical amounts ofcharge are placed on each body, such that the net force(gravitational plus electrical) on each is zero. What is the magnitude of the charge placed on..
The Earth is about to be swallowed by a black hole with the mass equal to ten Solar masses. At what distance from the black hole will the Earth be pulled apart by tidal forces - i.e. find the Roche limit for this system.
An 8.70-kg block slides with an initial speed of 1.56m/s up a ramp inclined at an angle of 27.4 degrees with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.62. Use energy conservation to find the distance the ..
Suppose the end of your finger is charged, Estimate the breakdown voltage in the air for your finger
a surface is so constructed that at all points on the surface the vector points outward. therefore it can be said
A rectangular coil of wire with 25 loops carries a current of 24.2 mA. The coil's dimensions are 8.5 cm by 2.3 cm. What is the magnetic moment of the coil
Two identical rollers are mounted with their axes parallel, in a horizontal plane, a distance 2d = 23.6? cm apart. The two rollers are rotating inwardly at the top with the same angular speed ?.
If the ambulance is moving toward you at a speed of 26.3 m/s and you are moving toward it at a speed of 16.0 m/s, find the wavelength and frequency of the sound you hear
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water
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