In the context of measuring the properties of galaxies, a__________is an object of known brightness that astronomers use to find distance
A) black hole
B) white dwarf
C) standard candle
D) red giant
C
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Predict the yield strength of the titanium in Figure 7.9 with 4 % pre-strain if the grain size is reduced to 100 nm.
What will be an ideal response?
Suppose the Sun had been born with less mass, making it a smaller, cooler star. Which of the following consequences would we expect according to the nebular theory?
A) The frost line would have been farther from the Sun, so jovian planets could form only at greater distances than in our solar system. B) The frost line would have been closer to the Sun, so jovian planets could form at nearer distances than in our solar system. C) The planets would have formed just as they did for our actual Sun, but the weaker gravity of a smaller Sun would have allowed the planets to escape into interstellar space. D) There would have been no solar nebula in which material could condense to form planets.
By locating the north celestial pole (NCP) in the sky, how can you determine your latitude?
A) The altitude of the NCP is your angular distance from the North Pole. B) The direction of the NCP is the angular distance from the North Pole. C) The direction of the NCP is the same as your latitude. D) The altitude of the NCP is the same as your distance from the North Pole. E) The altitude of the NCP is the same as your latitude.
The product of gas pressure and volume for a given mass of gas is constant
A) if the temperature doesn't change. B) whether or not the temperature changes. C) never. D) none of the above