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A popular earring design features a circular piece of gold of diameter D with a circular cut out of diameter d, as shown in the figure. If this earring is to balance at the point P, show that the diameters should satisfy the condition: D = fd, where f = (1 + 5) / 2 = 1.61803K is the famous “golden ratio.”
A steel beam is placed vertically in the basement of a building to keep the floor above from sagging. Find the vertical compression of the beam
The figure below shows two points in an E-field: Point 1 is at (x1, y1) = (5,4) in m, and Point 2 is at (x2,y2) =(12,12) in m. The Electric Field is constant, with a magnitude of 56 V/m, and is directed parallel to the +x-axis. The potential at point..
A disc undergoes 30 revolutions as it accelerates uniformly from rest to 5 rev/sec. What's the angular acceleration of the disk
A particular motor can provide a maximum of 110.0 N • m of torque. Assuming that all of this torque is used to accelerate a solid, What angle will it rotate through to do this
the speed of sound in aluminum is 5000 ms. we excite standing waves in a rod of aluminum 1.30 m long such that there is
A worker pushed a 27 kg block 7.6 m along a level floor at constant speed with a force directed 32° below the horizontal. What was the increase in thermal energy of the block-floor system?
if the kinetic energy of a neutron confined inside a cubic box is 10 mev in its ground state calculate the size of the
A ball is thrown toward a cliff of height h with a speed of 30m/s and an angle of 60? above horizontal, What was the maximum height of the ball
An ac source of maximum voltage V0 = 30 V is connected to a resistor R = 50 O, an inductor L = 0.6 H, and a capacitor C = 20 µF. What is the maximum charge on the capacitor when the frequency of the source is set to the resonance frequency of the cir..
The distance between two successive maximaof a transverse wave is 1.70 m. Eightcrests, or maxima, pass a given point along the direction of travelevery 11.0 s. Calculate the wave speed
Class 2 lasers, including many laser pointers, produce visible light with no greater than 1 mW total power. Find the peak electric field in the laser beam
A 7-Kg bowling ball whose radius is 0.13 m is rolling directly towards you, turning 3 times per second. What is its translational angular momentum about you
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