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The rotation of a cylinder is slowed from an initial angular velocity of 3.40 rad/s to a final angular velocity of 2.00 rad/s during 20.0 revolutions at constant angular acceleration. What is the constant angular acceleration during this decrease in angular speed? How much time did the decrease in speed take?
Determine the mass of a 4.6 meter beam, if it is balanced on a fulcrum 2.16 meters from the left end. A 820 N man stands on the very left end, and a 360 N girl stands on the right end. (in kg)
A car is parked 21.0 m directly south of a railroad crossing. A train is approaching the crossing from the west, What frequency does the car's driver hear when the horn blast reaches the car
A 50.0 kilogram block is pulled from rest by a force of 1000 Newton at an angle of 37.0 degree across a horizontal rough surface over a distance of 5.60 meter. Determine what is the net work done on the block
A long uniform wooden bar with square crosssection floats on water. Show that , if the relativedensity of wood is 0.50, the bar will float with all fourfaces making an angle of 45 degrees with the water surface.
Suppose an object changes it velocity from v = (30i + 4j) m/s to v = (-4i + 30j) m/s in 5 seconds. What is its acceleration
Coherent light with wavelength 591 passes by two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 from the slits. The first-order bright fringe is a distance of 4.84 from the center of the central bright f..
A block of mass m=1.40kg slides along a horizontal table with speed Vo=2.50m/s. How far did the spring compress when the block first momentarily come to rest
Positive charge Q is distributed uniformly along a thin plastic rod that forms one quarter of a circle in the third quadrant of the x-y plane. The circle has radius a and its center is at the origin.
If it takes 9.19e5 J of heat to bring 0.30 kg of ice at -17*C to water vapor at 108*C, what is the specific heat of the water vapor
A metal sphere with radius r_a is supported on an insulating stand at the center of a hollow, metal spherical shell with radius r_b. There is charge + q on the inner sphere and charge - q on the outer spherical shell. Take potential V to be zero w..
A uniform electric field exists in a region between two oppositely charged plates. An electron is released from rest at the surface of the negatively charged plate and strikes the surface of the opposite plate, 2.0 cm away, in a time 7.6 x 10-8 s. (a..
A sledge loaded with bricks has a total mass of 17.4 kg and is pulled at constant speed by a rope inclined at 21.0° above the horizontal. What is the tension in the rope
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