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A) In the Bohr's model of the hydrogen atom, the electron moves in a circular orbit of radius 4.713 × 10-11 m around the proton. Assume that the orbital angular momentum of the electron is equal to h. Calculate the orbital speed of the electron. Answer in units of m/s.
B) Calculate the angular frequency of the electron's motion. Answer in units of s-1.
find the maximum distance she can be from the craft and still return within 2.30 min (the amount of time the air in her helmet remains breathable).
A particle leaves the origin with an initial velocityof 2.37 m/s in the x direction, and moves with constantacceleration ax = -1.73 m/s2 and y = 3.20 m/s2. What is the particle's velocity at this time
The displacement of a harmonic oscillator is given by y = 7.1 sin(25t), where the units of y are meters and t is measured in seconds. Evaluate what is its maximum velocity
In an ice show a 45.0 kg skater leaps into the air and is caught by an initially stationary 85.0kg skater. What is their final velocity assuming negligible friction and that the leaper's original horizontal velocity was 4.00 m/s
Ultraviolet light is incident normally on the surface of a certain substance. The binding energy of the electrons in this substance is 3.44 eV. The incident light has an intensity of 0.063 W/m2
Estimate the size of the friction force on a baseball player sliding into second base. Assume a mass of 84 and uk = 0.42
An astronaut is traveling to the Moon at a speed of 0.57c. When his spacecraft is1.9*10 8 m from the Moon, there is an explosion on the Moon. How long does it take for light from the explosion to reach the astronaut as gauged on the astronaut's clo..
Inductive battery chargers, which allow transfer of electrical power without the need for exposed electrical contacts, are commonly used in appliances that need to be safely immersed in water, Find an expression for the emf induced in the secondary..
A railroad car of mass 2.6 104 kg moving at 5.00 m/s collides and couples with two coupled railroad cars, How much kinetic energy is lost in the collision
When an automobile moves with constant speed down a highway, mostof the power developed by the engine is used to compensate for themechanical energy loss due to frictional forces exerted on the carby the air and the road.
A Ferris wheel is moving at an initial angular velocity of 1.0 rev/54s. If the operator then brings it to a stop in3.4min, what is the angular acceleration of the Ferris wheel
A 20 g plastic ball is moving to the left at 35 m/s. How much work must be done on the ball to cause it to move to the right at 35 m/s
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