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Light of wavelength 300nm strikes a metal whose work function is 2.2eV. What is the shortest de Broglie wavelength for electrons that are produced as photoelectrons?
List and explain briefly similarities and differences between the electric force between two charges and the gravitational force between two masses.
When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall.
A high-pressure gas cylinder contains 40.0 L of toxic gas at a pressure of 1.70 ? 107 N/m2 and a temperature of 18.0°C. What is the final pressure in the tank, assuming a negligible amount of gas leaks while being cooled
a braking force of 6000 n was applied to a 100kg truck bringing it to a complete rest in 75m.a. how much work ws done
Dave Johnson, the bronze medalist at the 1992 Olympic decathlon in Barcelona, How far does his center of mass move up as he makes the jump
A cannon at the top of a 119 m high clifffires at a pirate ship. The cannonball has an initial velocity of180 m/s at 58° above horizontal. Ignore air resistance. How far out from the cannon does the cannonball land?
the radius of a park merry-go-round is 2.2m. to start itrotation you warp a rope around it and pull with a force of 260 Nfor 12 s. what is the moment of inertia of the merry-go-round
A single turn current loop carrying a current of 4.0A, is in the shape of a right triangle with sides 50cm, 120 cm, 130 cm. The loop is in a uniform magnetic field of magnitude 75 mT whose direction is parallel to the current in the 130 cm side of..
seals may cool themselves by using thermal windows patches on their bodies with much higher than average surface
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +3q. Sphere B carries a charge of -q. Sphere C carries no net charge.
An electric motor is plugged into a standard 120V electrical service. At startup a current of 23.4A is measured. what is the operating current with the new resistor added
Early underwater exploration was conducted with a diving bell. Acylindrical diving bell 3.0 m in diameter and 4.0 m tall with thebottom open is submerged to a depth of 220 m in the ocean. How high does the sea water rise in the bellat this depth
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