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A 250 g 23-cm-diameter plastic disk is spun on an axle during its center by an electric motor. What torque should the motor supply to take the disk from 0 to 1700 rpm in 4.1s?
A.2m wire is moved perpendicular to a.5magnetic field at a speed of 1.5m/s. what emf is induced across the ends of the wire
A small piece of Styrofoam packing material is dropped from a height of 1.50 m above the ground. Until it reaches terminal speed, magnitude of its acceleration is given by a = g - bv. After falling 0.40 m, the styrofoam effectively reaches its ter..
The mass of a regulation tennis ball is 58.0 g (although it can vary slightly), and tests have shown that the ball is in contact with the tennis racket for 31.0 ms. what impulse did he exert on the ball
A gas is enclosed in a container fitted with a piston of cross-sectional area 0.150 m2. If the internal energy of the gas decreases by 6.40 J, find the amount of heat removed from the system by heat during the compression
A disc rolls down an inclined plane of angle 30o (see figure). What is the acceleration of the disc (in m/s2)
The figure below shows a composite slab with dimensions d1 = 13.6 cm, d2 = 2.80 cm, and d3 = 12.5 cm. Half the slab consists of aluminum (density = 2.70 g/cm3) and half consists of iron (density = 7.85 g/cm3). What are the coordinates of the center o..
A sled of mass 50.0 kg is pulled along flat, snow-coveredground. The static firiction coefficient is 0.30, and the kineticfriction coefficient is 0.10. What does the sled weigh
A parallel-plate capacitor is made by placing polyethylene ( =2.3) between two sheets of aluminum foil. The area of eachsheet of aluminum foil is 410 cm2, and the thickness ofthe polyethylene is 0.5 mm.
A thin rod of length L and negligible mass can pivot about oneend to rotate in a vertical circle. A heavy ball of mass m isattached to the other end. how much work does its weight do on it
The left end of a long glass rod 8.00 cm in diameter and with an index of refraction of 1.60 is ground and polished to a convex hemispherical surface with a radius of 4.00 cm. Find the height of the image formed by paraxial rays incident on the con..
A narrow beam of light is incident from air onto a glass surface with an index of refraction of 1.56. Compute the critical angel for the incident light
How far will the ball travel if the bat is 1 m in length if the instaneous linear velocity of the bat is 37.5 m/s at the moment of impact
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