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In a X-ray tube, electrons are accelerated through a potential of 10, 000V. How much energy does the accelerated electron have? and what is the velocity of the electrons.
A child slides down a playground slide; the coefficient of the kinetic friction is uk=0.15, with what speed does she exit the slide
A football is kicked at ground level with a speed of at an angle of 35.0º to the horizontal. How much later does it hit the ground
A particular Bohr orbit in a hydrogen atom has a total energy of -0.85eV. What is the kinetic energy of the electron in this orbit
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. If the original star rotated once in 34 days, find the angular speed of the neutron star
An ice-making machine inside a refrigerator operates in a Carnot cycle. It takes heat from liquid water at 0.0 degrees Celsius, How much heat |Q_H| is rejected to the room
A 25.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 20.00 m. When she is partway down the slide, Calculate the mechanical energy lost due to friction
A strip of paper is pulled along at 20m/s at a right angle to the plane of a .49m long pendulum. The pendulum has a small ink jet device to the bob so that it marks the position of the pendulum on the paper. The bob is held 8.0cm to one side and rele..
You take a set of measurements for the wavelengths and frequencies of standing waves on a string that is under a tension of 1.96 N. What is the linear mass density of the string
Suppose a car is traveling at +16.8 m/s, and the driver sees a traffic light turn red. After 0.569 s has elapsed, calculate the stopping distance of the car
A U.S. penny has a diameter of 1.9000cm at 20.0 C. The coin is made of a metal alloy (mostly zinc) for which the coefficient of linear expansion is 2.6x10^-5 K^-1. What would its diameter be on a hot day in Death Valley
question what is the subsequent angular speed of the wheel?a potters wheel with rotational inertia 6.50 is spinning
A woman with a mass of 47.0 kg is standing on the rim of a large disk that is rotating at an angular velocity of 0.480 about an axis through its center, Calculate the magnitude of the total angular momentum of the woman-plus-disk system
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