Which model did Galileo disprove by discovering the transit of Venus?
a. Ptolemaic
b. Copernican
c. Aristotelian
d. Plutonic
e. Kepler
a
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Gasoline is useful in cars because it has
A) chemical potential energy. B) electrical potential energy. C) kinetic energy. D) gravitational potential energy. E) radiative energy.
Which statement about accretion disks is not true?
A) The gas in the inner parts of the disk travels faster than the gas in the outer parts of the disk. B) The gas in the inner parts of the disk is hotter than the gas in the outer parts of the disk. C) The primary factor determining whether a white dwarf has an accretion disk is the white dwarf's mass. D) Accretion disks are made primarily of hydrogen and helium gas.
State the reciprocity law.
What will be an ideal response?
Recall the raisin cake model of the universe and its analogy to our expanding universe. Suppose you measure the recession velocity (the speed at which any object is moving away from us) of Galaxy A to be 2000 km/s and the recession velocity of Galaxy B to be 6000 km/s. What can you conclude about the relative distances of these two galaxies?
A) Galaxy A is 3 times as far from us as Galaxy B. B) Galaxy B is 3 times as far from us as Galaxy A. C) Galaxy A is 6 times as far from us as Galaxy B. D) Galaxy B is 6 times as far from us as Galaxy A. E) The relative distances cannot be determined from the information in this problem.