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Find the wavelength of light emitted by a hydrogen atom, when the electron moves from n = 7 quantum state to n = 5 quantum state.
Wavelength = ____ nm
A 0.400-kg bead slides on a frictionless, curved wire, starting from rest at pt A, Find the speed of the second bead just after the collision
A conical pendulum is formed by attaching a 0.400kg ball to a 1.00m -long string, then allowing the mass to move in a horizontal circle of radius 40.0cm, What is the ball's angular velocity, in rpm
During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 230 J from 440 J. Explain how high does she rise during this interval? Neglect air resistance.
A lens for a 35-mm camera has a focal length given by f = 47 mm. What is the magnification of the image on the film
Coherent light with wavelength of 602 passes by two very narrow slits and the interference pattern is observed on a screen a distance of 3.00 from the slits. The first-order bright fringe is a distance of 4.84 from the center of the central bright..
A small sphere of charge q1 = 0.872 µC hangs from the end of a spring. When another small sphere of charge q2 = -0.642 µC is held beneath the first sphere, the spring stretches by d = 3.57 cm from its original length.
A rescue plane flies horizontally at a constant speed searching for a disabled boat, If it takes the sound 2.10 s to reach the plane, determine the speed of the plane and What is its altitude
An electron travels north at a speed of 6.0x10^4 m/s through a uniform magnetic field that is directed upwards and whose magnitude is 1.8x10^-3 T. determine the direction of the magnetic force
The volume of 9 mol of a monatomic gas is increased from 3 L to 6 L at constant pressure. The initial temperature of the gas is 31?C. How much heat must be supplied to the gas
You exert a force of 25 N on the head of a thumbtack. What is the pressure on your thumb
A glass bead (diamter of about 2 mm) has a total charge of +10 nC. A proton is located at a distance of 6 cm from the center of the glass bead. What is the magnitude of the force experienced by the proton
A microwave oven with microwaves 12.2 cm long has a power output of 760 Watts. Find the number of photons emitted per second
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