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Question: An electron has a kinetic energy equal to twice its rest energy.
Question 1: What is the speed of the electron?
Please explain your steps to find the speed of the electron.
A horse canters away from its trainer in a straight line, moving 140m away in 18s. It then turns abruptly and gallops halfway back in 4.9s.
When a high-power laser is used in the Earth's atmosphere, the electric field associated with the laser beam can ionize the air, What laser beam intensity will produce such a field
Near the surface of the Earth, an ideal spring with spring constant k = 50 N/m is on a frictionless horizontal surface at the base of a frictionless inclined plane, what is the angle µ of the inclined plane relative to the horizontal
A disk released from the top of an inclined plane has a speed of 5.52 m/s at the bottom. How high is the upper end of the inclined plane
the crate shown is held against wedge b by a spring. the spring is 96.0 of its original uncompressed length l2.75m and
A photographic image of a building is 0.0920 m high. The image was made by a lens with a focal length of 51.0 mm. If the lens was 110 m from the building when the photograph was made, decide the height of the building.
A woman stands on a scale in a moving elevator. Her mass is 73.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. What does the scale read during the acceleration
A 1055 kilogram van, stopped at a traffic light, is hit directly in the rear by a 660 kilogram car traveling with a velocity of +1.95 m/s. Determine the final velocity of each vehicle
A baseball approaches home plate at a speed of 48.0 m/s, moving horizontally just before being hit by a bat. The batter hits a pop-up such that after hitting the bat, the baseball is moving at 57.0 m/s straight up. The ball has a mass of 145 g and is..
A proton takes 99.0?s to complete one orbit around a 14.5 m diameter cyclotron. What's the cyclotron's magnetic field
You are given a container with 25.7 g of hydrogen atoms, What is the total charge on the electrons in the container
q1. a piece of wood is 6.00 m long 0.260 m wide and 0.060 m thick. its density is 600kgm cubed. what volume of iron p
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