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A student sits on a rotating stool holding two 7.00 kg objects. When his arms are extended horizontally, the objects are 0.80 m from the axis of rotation, and he rotates with an angular speed of 0.74 rad/s. The moment of inertia of the student plus stool is 6.60 kg·m2 and is assumed to be constant. The student then pulls the objects horizontally to 0.40 m from the rotation axis. Find the new angular speed of the student.
Consider a flat disc of radius R and surface charge density (sigma) = a s^n, Find the potential at the center of the disc
An electron has an initial velocity of 2.00 106 m/s in a uniform 5.00 105 N/C strength electric field. How far does the electron travel before coming to rest
A "seconds pendulum" is one that moves through its equilibrium position once each second. (The period of the pendulum is precisely 2.000 s.) The length of a seconds pendulum is 0.9928m at Tokyo and0.9941m at Cambridge, England.
Determine the same situation, but now let the initial speed v0 of the first ball be given and treat the height h of the building as an unknown. What should the height of the building be for both balls to reach the ground at the same time for v0= 8..
High-speed stroboscopic photographs show that the head of a 184 g golf club is traveling at 35.2 m/s just before it strikes a 45.9g golf ball at rest on a tee
A large power plant converts 1000 kg of water to steam every second to run its generators. Compute the amount of heat required each second just to vaporize the water, assuming this is done at 100 C. What is the power input in megawatts for this pu..
A charge q = +929 ?C is uniformly distributed on a thin nonconducting ring of mass m = 0.60 g and radius r = 2.60 cm. What is the final angular velocity of the ring
he string in a yo-yo is wound around an axle of radius 0.529 cm. The yo-yo has both rotational, What is the speed of the yo-yo when it reaches the distance of 1.50 m
Identical point charges of +3.6 C are fixed to diagonally opposite corners of a square. A third charge is then fixed at the center of the square, such that it causes the potentials at the empty corners to change signs without changing magnitudes.
A motor boat haeds due east at 5 m/s acorss a river that flows toward the south at 5 m/s. If the river is 125m wide, how longs does it take the boat to cross the river.
A transmission line that has a resistance of 0.5 ohm per km of length is used to transmit 200 MW across 300 miles. what should be the transmission voltage
A uniform disk with a mass of 885 g and radius 17.0 cm is rotating on frictionless bearings with an rotational speed of 18.0 Hz when Jill drops a 145-g clod of clay on a point 8.40 cm from the center of the disk, where it sticks. What is the new rota..
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