The value of a wavelength in the Balmer series is 372.1 nm. What is the corresponding value of n?
A) 6
B) 3
C) 9
D) 10
E) 14
E
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What nuclear fusion mechanism does an isolated white dwarf use to generate energy?
a. proton-proton chain b. CNO cycle c. triple alpha process d. white dwarfs don't generate their own energy.
In the process of fluorescence, ________ is absorbed by an atom and the energy is emitted as ________.
A. an ultraviolet and one or more lower energy photons; a visible light photon B. a visible light and one or more lower energy photons; an ultraviolet photon C. an ultraviolet photon; at least one visible light and one or more lower energy photons D. a visible light photon; at least one ultraviolet and one or more lower energy photons
What device converts mechanical energy into electrical energy?
A) solenoid B) motor C) generator D) spectrometer E) transformer
A 20.0-kg traffic light hangs midway on a cable between two poles 30.0 meters apart. If the sag in the cable is 0.40 meters, what is the tension in each side of the cable?
a. 9.8E+1 N b. 9.8E+3 N c. 3.7E+3 N d. 3.8E+2 N e. 2.0E+4 N