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The electron of a hydrogen atom is initially at the orbit n=4. If this electron first goes to the orbit n=3 and then to the orbit n=2 and then to the orbit n=1, how many photons are emitted during these transitions? How many photons are emitted if the electron directly falls from the orbit n=4 to the orbit n=1?
A ball of mass 0.113 kg is dropped from a height of 1.92m above ground. The acceleration of gravity is 9.8m/s^2.Neglecting air resistance find the speed of the ball when it is at a height of 0.812 m above the ground. Answer in units of m/s.
A parallel-plate vacuum capacitor with plate area A and separation x has charges +Q and -Q on its plates. The capacitor is disconnected from the source of charge, What is the change in the stored energy
An electron has an initial velocity of 5.00 106 m/s in a uniform 3.00 105 N/C strength electric field. What is the direction of the electric field
A rotating water pump works by taking water in at one side of the rotating wheel, and expelling it from the other side. If a pump with a radius of 0.120m starts from rest and accelerates at 30.50 rad/s2.
An electron with a speed of3.6105m/s enters a uniform magnetic field of magnitude0.057T at an angle of 35° to the magnetic field lines. The electron will follow a helical path.
A 2000 kg car is traveling at 15.0 m/s down a long mountain grade of 2.0%. The mountain road is 5.0 km long. What is the increase in the temperature of the brakes
The G string on a violin has a fundamental frequency of 196 Hertz. calculate the effective length of her string
A housing attached to a microprocessor uses radiator fins to get rid of excess heat. determine what is the associated wavelength
As a baseball is being thrown, it goes from 0.0 to 40.0 ms in 0.34 s, What is the acceleration of the baseball
Two blocks of masses m1 = 2.00 kg and m2 = 3.60 kg are each released from rest at a height of h = 4.80 m on a frictionless track, Determine the velocity of each block just before the collision
A model rocket is constructed with a motor that can provide a total impulse of 29.0 Ns. The mass of the rocket is 0.175 kilogram. Find the speed that this rocket achieves
the shaft of a pump starts from rest and has an angularacceleration of 3.00 rad/s2 for 18.0s. find the angle through which the shaft has turned
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