Which one of the following is not an electromagnetic wave?
A) UV
B) infrared
C) radio waves
D) sound waves
E) gamma rays
D
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Calculate the radius in nanometers of the Bohr orbit of a hydrogen atom's electron with n = 6
The exchange particle for quarks is called
A) the stickon. B) the gluon. C) the epsilon. D) the epoxyon.
Suppose that inflation did not occur. In that case, the fact that the cosmic microwave background has the same temperature in opposite directions of the sky would be considered
A) surprising, because those locations would never have been close enough to have any light or matter exchanged between them. B) surprising, because we would not expect those locations to have the same age. C) natural, because everything in the universe is naturally expected to have the same temperature. D) natural, because quantum fluctuations in the early universe would have ensured that the whole universe had precisely the same temperature.
A buoy, used to mark a harbor channel, consists of a weighted rod 2.00 m in length. 1.50 m of the rod is immersed in water and 0.500 m extends above the surface
If sunlight is incident on the water with an angle of incidence of 40.0°, what is the length of the shadow of the buoy on the level bottom of the harbor?