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You stand on a frictional platform that is rotating at 1.9 rev/s. Your arms are outstretched, and you hold a heavy weight in each hand. The moment of inertia of you, the extended weights, and the platform is 8.2 kg · m2. When you pull the weights in toward your body, the moment of inertia decreases to 4.0 kg · m2.
(a) What is the resulting angular speed of the platform?
(b) What is the change in kinetic energy of the system?
(c) Where did this increase in energy come from? (Select all that apply.)
You desire to observe details of the Statue of Freedom, the sculpture by Thomas Crawford that is the crowning feature of the dome of the United States Capitol in Washington D.C. what focal length should the eyepiece have
An MSU linebacker of mass 118.0 kg sacks a UM quarterback of mass 87.0 kg. Just after they collide, they are momentarily stuck together, how fast was the linebacker moving just before the collision
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Consider a string with length 36 cm. The two ends are attached to the ceiling, separated by distance 30.0 cm. Determine the tension in the right segment of the string
If a third charge, of 5, is now placed at the point = 3.00, = 4.00 find the components of the total force exerted on this charge by other two charges.
A stainless-steel orthodontic wire is applied to a tooth that is out of line by 40 degrees. find the magnitude of the force on the tooth
The plates of a 7.4-µF capacitor have net charges of +0.83 µC and -0.83 µC respectively. Which plate is at the higher potential
An electric field applies a force of 9.11x10^-16 N to an electron emitted from a cathode of a cathode ray tube at essentially zero velocity
A skier is slinding downhill at 11 m/s when she reaches an icy path on which her skies more freely with negligible friction. find the speed of the skier at the bottom of the icy path
For the polarisers, assume the incident light is linearly polarized, the transmitted intensity (through both polarisers) is 0.15×I0, and the axis of the second polarizer makes an angle θ=41° with the axis of the first polarizer. What is the angle (in..
A charge Q is transferred from an initially uncharged plastic ball to an identical ball 11cm away. The force of attraction is then 19mN. How many electrons were transferred from one ball to the othe
A uniform solid sphere of radius 0.503 m and mass 15.7 kg turns counter clockwise (when viewed from above) about the vertical axis through its center. Find its vector angular momentum when its angular speed is 3.08 rad/s. Wouldn't you use the formula..
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