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In the neck of the picture tube of a certain black-and-white television set, an electron gun contains two charged metal licplates 2.80 cm apart. An electric force accelerates each electron in the beam from rest to 9.60% of the speed of light over this distance.
1. Decide the kinetic energy of the electron as it leaves the electron gun. Electrons carry this energy to a phosphorescent material on the inner surface of the television screen, making it glow. For an electron passing among the plates in the electron gun, determine
2. The magnitude of the constant electric force acting on the electron,
3. The acceleration, and
4. The time of flight.
You have a 3.5 m high platform that is level on top. A spring launcher is located on the top so that it launches objects horizontally. How far away from the launcher will it hit the ground
A 245 kg person lays on board that is supported only on the ends and that has a mass of 12.0 kg. what is the force on either side where the board is supported
A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force required to keep the car from sliding
consider a youngs two-slit experiment in which the wavelength of light is 35 smaller than the distance between the
initially unpolarized light is sent into a system of three polarizing sheets whose polarizing directions make angles of ?1 = ?2 = ?3 = 51° with the direction of the y axis, What percentage of the initial intensity is transmitted by the system
a 90kg box is pushed by a horizontal force F at a constant speed up a ramp inclined at 28 degrees. Determine the magnitude of the applied force
Estimate the power radiated by the human body. Be sure to state the estimated values of all relevant quantities. You need only outline your calculations. How does this value compare with the average caloric intake for humans?
astronaut on the moon fires a projectile from a launcher ona level surface so as to get the maximum range. What is the range of the projectile
What is the net force exerted on the skier, assuming his acceleration is constant.
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.961 rad/s. Calculate the total angular momentum of the system
A 2.50-kg stone is dropped from rest at a height of 3.75 m. What impulse does gravity impart to this stone from the instant
Gamma rays of photon energy 0.458 MeV are directed onto an aluminum target and are scattered in various directions by loosely bound electrons there. find the photon energy of the rays scattered in this direction
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