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In the figure below, a uniform rod of mass 4 kg is free to pivot about the wall at a point P. It is supported by a string which hangs at an angle of Φ = 45° to the horizontal as shown. If the rod is at rest the tension in the string is?
A circular loop in the plane of the paper lies in a 0.7 T magnetic field pointing into the paper. find what is the average induced current
A wave is described by the equation y = 29.0 sin(93.0t) where y is in meters and t is in seconds. What is the frequency (in Hz) of the source of this wave?
Light of wavelength 687 nm is incident on a single slit 0.75 mm wide. At what distance from the slit must a screen be placed if the second dark fringe in the diffraction pattern is to be 1.7 mm from the center of the diffraction pattern?
how do you calculate the position of the eyering on an astronomical telescope? in other words how do you find the
the supersonic aircraft concorde has a length of 61.5m when sitting on th ground on a typical day when the temperature is 15.0 degrees C. what is the temperature of the concordes skin in flight
A marble is projected up along a 11 ° incline track at an initial speed of 2.2m/s and then coasts without friction. How far did the marble travel before it comes to its momentary rest point
If an enclosed volume of ideal has is heated, raising its temperature from 10 c to 20 c, by what factor does the pressure change
A solid conducting ball with charge +2Q is placed inside aconducting shell. how much charge is on the outer surface of the shell
A motorist drives south at 20.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.00 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.00 min trip, find (a) the total vector displacement, (b) the average speed, and..
A crate of 48.0 tools rests on a horizontal floor. You exert the gradually increasing horizontal push on it and observe that the crate just begins to move while your force exceeds 344. After that you must reduce your push to 260 to keep it moving at ..
Two boats are heading away from shore. Boat 1 heads due north at a speed of 3.2 m/srelative to the shore. Relative to boat 1, boat 2 is moving 40°north of east at a speed of 1.5 m/s.
A motorist driving a 1200-kg car on level ground accelerates from 20.0 m/s to 30.0 m/s in a time of 5.7 s. determine the average mechanical power in watts the engine must supply during this time interval
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