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A proton moves in a constant electric field from point A to point B. The magnitude of the electric field is 6.4 × 104 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance from point A to point B is 0.50 m, what is the change in the proton's electric potential energy, EPEB - EPEA?
A Sodium surface, which has a work function ? of 2.46 eV is illuminated with ? = 300nm light. Find the threshold frequency for Sodium
Binoculars denoted as 7 x 50 have a total magnification of 7 times and objective lenses of 50- mm diameter. What is the focal length of the eyepiece
question1a bridge truss extends 200m across a river. the structure is free to slide horizontally to permit thermal
A 645N woman climbs a staircase that rises at 50 degrees above the horizontal and is 4.95m long. Her speed is a constant 40.0cm/s. How much work has gravity done on her as she climbed the stairs
An object with a mass of 0.527kg is attached to a long horizontal spring with a constant of 52.6kg/s2. At small angles with the same object, what length is required for a pendulum to have the same period
The hot-reservoir temperature of a Carnot engine with 26.0 % efficiency is 70.0 ?C higher than the cold-reservoir temperature. What is the cold reservoir temp
An object is placed to the left of a convex lens and on the optical axis. What is the magnification of the image formed by the lens
A solenoid is 8.93 cm long, 1.56 cm in diameter, and has 310 turns. find the magnetic flux through one turn of the solenoid
A baseball is thrown from the roof of 21.1 m-tall building with an initial velocity of magnitude 11.6 m/s and directed at an angle of 53.9 above the horizontal. Use = 9.80 m/s^2. What is the speed of the ball just before it strikes the ground
the displacement of a string carrying a traveling sinusoidal wave is given byyxt ym coskx - 2pft - fat time t 0 the
Two railroad cars, each of mass 7300 kg and traveling at 73 km/h, collide head on and come to rest. How much mechanical energy is lost in this collision
The right-side rearview mirror of Mike's car says that objects in the mirror are closer than they appear. Mike decides to do an experiment to determine the focal length of this mirror. What is the focal length of the rearview mirror
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