A thin-film gold conductor for an integrated circuit in a satellite application is deposited from a vapor, and the deposited gold thin film has a high resistivity. It is proposed that the high resistivity is due to a high nonequilibrium vacancy concentration, created when the vapor atoms rapidly condense into the thin film. To
The equilibrium vacancy concentration is calculated from the equation
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Which of the following telescopes must be used above Earth's atmosphere?
a. an optical telescope b. the VLBA telescope c. an X-ray telescope d. a radio telescope e. None of the other choices are correct.
A ball is thrown against a wall, bounces off, and is caught. The number of impulses acting on the ball is
1) one. 2) two. 3) three. 4) none. The greatest impulse occurs when the ball 5) is thrown. 6) bounces against the wall. 7) is caught. 8) is zero for each. 9) is nonzero, but the same for each case.
Interference is the superposition of two or more waves
Indicate whether the statement is true or false
Spicules
a. are found in the photosphere. b. are magnetic disturbances that push large loops of material off the solar surface. c. are responsible for twisting the solar magnetic field and causing the sunspot cycle. d. appear in the corona near the north and south poles of the Sun during a total solar eclipse. e. are visible in filtergrams of the solar chromosphere.