For an oxide to be protective, the ratio of the volume of the oxide formed to the volume of the metal atoms that formed the oxide should be approximately _________.
Fill in the blank(s) with the appropriate word(s).
one
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Series Resonance: A series RLC circuit has a 100-? resistor, a 0.100-?F capacitor and a 2.00-mH inductor connected across a 120-V rms ac voltage source operating at 1000/? Hz. What is the resonant frequency of this circuit?
A. 70.7 kHz B. 17.9 kHz C. 22.5 kHz D. 35.3 kHz E. 11.3 kHz
On a cosmic calendar, in which the history of the universe is compressed into 1 year, when did Kepler and Galileo first discover that we live on a planet in a solar system?
A) 1 second ago B) 1 day ago C) 1 week ago D) December 25 E) December 30
Which of the following statements about electron degeneracy pressure and neutron degeneracy pressure is true?
A) The life of a white dwarf is an ongoing battle between electron degeneracy pressure and neutron degeneracy pressure. B) Both electron degeneracy pressure and neutron degeneracy pressure help govern the internal structure of a main-sequence star. C) Electron degeneracy pressure is the main source of pressure in white dwarfs, while neutron degeneracy pressure is the main source of pressure in neutron stars. D) In a black hole, the pressure coming from neutron degeneracy pressure is slightly greater than that coming from electron degeneracy pressure.
The most abundant gas in the atmosphere is
a. oxygen. b. nitrogen. c. water vapor. d. carbon dioxide.