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A nonrotating rod of mass M and length L is dropped onto the freely spinning disk of mass M and length L. They then both turn around the spindle with their centers superposed. If the disk was turning at 5 rad/s around a frictionless spindle before the rod was dropped, what is the angular speed after the rod drops?
A storage capacitor on a random access memory (RAM) chip has a capacitance of 55fF. If the capacitor is charged to 5.3V, How many excess electrons are on its negative plate?
Consider a galvanometer with an internal resistance of 60 O. If the galvanometer is being used as an ammeter (with no additional resistance) it deflects full scale when it carries a current of 0.5 mA.
Light from a 554-nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 22 °
a magnetic field is oriented at an angle of 31deg to the normal of a rectangular area 5.5 cm by 7.2 cm. if the magnetic
Old naval ships fired 13 kg cannon balls from a 210 kg cannon. It was very important to stop the recoil of the cannon, since otherwise the heavy cannon would go careening across the deck of the ship.
A student reading his physics book on a lake dock notices that the distance between two incoming waves is about 0.85m, and then measures the time of arrival between the crests to be 1.7s. What is the approximate speed of the waves?
For a wavelength at the peak of visual sensitivity, 550 nm, how many photons lead to an observable flash
You fly your 15 m spaceship, parallel to the ship's length with a speed of c/3 to your friend. How long is your spaceship as observed by your friend
To avoid hitting a pedestrian, a car driver slams on her brakes and comes to a complete stop after skidding 16 m. find the speed of the car when the brakes were applied
When a 20 Volt emf is located across two resistors in series, a current of 2.0 Amp is present in each of the resistors. Obtain the magnitude of the greater of the two resistances
Four 25 kg children are sitting on the edge of a 3 m radius 80kg merry go round that is shaped like a disk. Its frequency is 1/3 Hz, What is the moment of inertia before and after
In a television set the power essential to operate the picture tube comes from the secondary of a transformer. The primary of the transformer is connected to a 120-V receptacle on a wall.
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