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A thin uniform rod is rotating at an angular velocity of9.0 rad/s regarding an axis that is perpendicular to the rod at its center. As the drawing indicates, the rod is hinged at two places, one-quarter of the length from each end. Without the aid of external torques, the rod abruptly assumes a "u" shape, with the arms of the "u" parallel to the rotation axis. What is the angular velocity of the rotating"?
The power radiated by a star is 8.0 x 10^30 W. What is the intensity of the radiation from this star at a distance of 1.0 x 10^12 m from the star
A large cruise ship of mass 6.70 107 kg has a speed of 13.0 m/s at some instant. How much work is required to stop it
A 5.0 deep swimming pool measures 30 by 16. What force does the water exert on the bottom of the pool
A convex mirror is needed to produce an image that is seven-eighths the size of an object and located 28 cm behind the mirror. What focal length should be specified
A mica sheet 0.969 ?m thick is suspended in air. In reflected light, there are gaps in the visible spectrum at 460, 525, Calculate the index of refraction of the mica sheet
a positive charge q1 is located to the left of a negative charge -q2. on a line passing through the two charges there
After hitting a long fly ball that goes over the right fielder's head and lands in the outfield, the batter decides to keep going past second base and try for third base. how much work was done on the player by friction
A dentist wants a small mirror that, when 3.00 cm from a tooth, will produce a 4.5X upright image. What must its radius of curvature be
The central star of a planetary nebula emits ultraviolet light with wavelength 104nm. What is the first-order diffraction angle
the working substance of an engine is 1.00 mol of a diatomic ideal gas. the engine operates in a cycle consisting of
a 21 nf capacitor is connected across an ac generator that produces a peak voltage of 4.8 v.a at what frequency is the
How far apart would the two sphere. Uranium-238 (U238) has three more neutrons than uranium-235 (U235). Compared to the speed of sound in a bar of U235, is the speed of sound in a bar of U238 higher, lower, or the same? There are several factors ..
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