If a light bulb has half the resistance of a 50-W lightbulb, what would be its wattage? Assume both bulbs are attached to the same 120-V circuit
a. More information is needed. c. 200 W
b. 25 W
d. 100 W
D
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___________ can be used to determine the galaxy's mass if the galaxy is reasonably close so that the Doppler shift of the galaxy disk material can be measured at several distances from the galaxy's center relative to the center
a. The Hubble constant b. A galaxy's color c. A galaxy's rotation curve d. A galaxy's diameter e. The velocity dispersion method
To see the Sun's hot corona (a temperature of 1,000,000 K), which part of the electromagnetic spectrum should one observe?
A) the visible B) the X-ray C) the ultraviolet D) the radio E) the infrared
The quantum mechanical model of the hydrogen atom requires that if the orbital quantum number = 4, there will be how many permitted orbital magnetic quantum numbers allowed?
a. 3 b. 4 c. 8 d. 9 e. 16
All quarks have 1/3 the electric charge of an electron
Indicate whether the statement is true or false