To determine the structure of the interior of a star, astronomers must balance density, luminosity, and ____
a. mass
b. temperature
c. mass and temperature
d. mass and opacity
e. temperature and opacity
c
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Ball A is dropped from the top of a building. One second later ball B is dropped from the same point. As time progresses, the distance between them
A. increases. B. decreases. C. remains constant. D. need more information
Which of the following describes parallax?
A) It is best measured over exactly one year intervals. B) It is inversely proportional to the distance to the star. C) It was first observed by Galileo with his new telescope. D) It is only applicable to objects within the solar system. E) It is more accurate as the distances to objects becomes greater.
The electric charge of all electrons
A) vary from atom to atom. B) vary from ion to ion. C) are identical.
In a single-slit diffraction experiment, the first minimum in the diffraction pattern occurs at an angle given by sin? = 2?/W
Indicate whether the statement is true or false