Voltage is a measure of the energy per unit charge supplied by a battery
Indicate whether the statement is true or false
T
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The absorption lines in the visible portion of the spectrum of a star that are produced by hydrogen are from the
a. Lyman series. b. Balmer series. c. Paschen series. d. isotopes of hydrogen. e. ions of hydrogen.
When you see the bright flash of a meteor, what are you actually seeing?
A) emission of visible light from a particle that has not yet entered Earth's atmosphere B) the glow from a pea-size particle and the surrounding air as the particle burns up in our atmosphere C) a star that has suddenly shot across the sky D) the flash that occurs when a speeding rock from space hits the ground
_________________ absorbs most infrared and microwaves coming from outside Earth's atmosphere
Fill in the blank(s) with correct word
Energy Density in a Magnetic Field: A large electromagnet has a 22 T magnetic field between its poles. What is the magnetic energy density in that region of space? (?0 = 4? × 10-7 T ? m/A)
A. 190 J/cm3 B. 88 J/cm3 C. 240 J/cm3 D. 30,000 J/cm3