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A sodium surface is illuminated by a light of wavelength 300nm. The work function for sodium metal is 2.46 eV. Discover (a) the kinetic energy of the ejected photoelectron, (b) the cut off wavelength for sodium. c) the maximum speed of the photoelectrons ejected
What is the gauge pressure of ocean water at a depth of 73.6 m? The density of ocean water is 1035 kg/m3
q1. a submarine is 306 m horizontally out from a shore and 120 m beneath the surface of the water. a laser beam is sent
Two identical small insulating balls are suspended byseparate 0.25-m threads that are attached to a common point on theceiling. Each ball has a mass of 8.0 × 10-4 kg.Initially the balls are uncharged and hang straight down.
A block with mass m = 6.2 kg is attached to two springs with spring constants kleft = 35 N/m and kright = 51 N/m. What is the total energy stored in the system
A gardener pushes a box of tools across a driveway by applying a 20.5- N force that pushes downward at an angle of 34.9 o with respect to the horizontal
A 958 N Rocket is coming in for a vertical landing. It starts with a downward speed of 25 m/s, What must be the direction of the engine thrust force
A particle with charge q moves in a circular orbit around the origin with radius a in the xy-plane with constant angular velocity omega. At t = 0 the particle sits at the point (a, 0).
A 13 g projectile traveling 152 m/spenetrates into a 0.25-kg wad of putty and emerges cleanly at42 m/s. how fast does it move after the projectile emerges
A friend who is 480 cm tall stands 2.0m from a plane wall mirror. How tall must the mirror be if you are to see all of your friend in the mirror
The lens of a camera with focal object length fo =9cm perfectly focuses the image of an object on film located adistance 14 cm away from the lens. How far did the object move
A small 10.0-g bug stands at one end of a thin uniform bar that is initially at rest on a smooth horizontal table. what is the angular speed of of the bar just after the frisky insect leaps
A spinning flywheel has rotational inertia I = 403.9 kg · m2. What is the frictional torque acting
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