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A certain species of ionized atoms produces an emission line spectrum according to the Bohr model, but the number of protons Z in the nucleus is unknown. A group of lines in the spectrum forms a series in which the shortest wavelength is 205.1 nanometers and the longest wavelength is 468.8 nanometers. Obtain the next-to-the-longest wavelength in the series of lines.
a cylinder-shaped carbon resistor is 8 em in length and its circular cross section has a diameter d 1 mm. a determine
A child on the merry-go-round is moving with a speed of 1.15 m/s when 1.10 m from the center of the merry-go-round.
a bullet is fired through a board 14.0 cm thick with its line of motion perpendicular to the face of the board. if it
When light from your desk lamp passes through a 45-mm focal length lens, How far is the desk lamp from the lens
If that ball had been released from the same height, but this time above the surface of the moon, how long would it have taken for the ball to hit the ground
A beam of hydrogen molecules (H2) is directed toward a wall, at an angle of 49 degree with the normal to the wall. Compute what is the beam pressure on the wall
Calculate how much energy is required to change a 55 gram ice cube from ice at -25°C to steam at 105°C
A hunter aims directly at a target (on thesame level) 130 m away. If the bullet leaves the gun at aspeed of 290 m/s, by how much will it miss the target
A space craft with a mass equal to .25*(mass of moon) is in orbit about the sun with a period of 3 years. calculate the average radius of the space craft's orbit. (the distance from the space craft to the sun).
A flat circle of radius 17 cm is placed in a uniform electric field of magnitude 6.2 102 N/C. What is the electric flux through the circle when its face is perpendicular to the field lines
An unknown number of moles of an ideal monoatomic gas expand reversibly from Vi = 1.30 m3 to Vf = 2.20 m3, Calculate the work done by the gas
In reality, the COP of the heat pump will only be 60 percent of the ideal value. What is the minimum power of the electric motor when the COP is 60 percent of the ideal value
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