As drops fall from a leaky faucet they become
A) closer together as they fall.
B) farther apart as they fall.
C) a fixed distance apart as they fall.
D) none of the above
Answer: B
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By substituting for Eb? (T) performing the integration over the entire spectrum, derive a relationship between ? and the constants C1 and C2
GIVEN
where
FIND
• A relationship between ? and C1 and C2
What evidence leads astronomers to conclude that the universe contains a mysterious dark energy?
A) The expansion of the universe is accelerating with time. B) The gravity of distant galaxies is stronger than that of galaxies nearby. C) Studies of galactic motion indicate that there is more matter in the universe than we can account for with stars and gas. D) Stars shine much more brightly than we would expect from nuclear fusion. E) The existence of such dark energy is the only way to account for evil in the universe.
The axial tilt of Mars has varied from near 0 to 60 degrees.
Answer the following statement true (T) or false (F)
The period-luminosity relation is critical in finding distances with:
A) RR Lyrae stars. B) trigonometric parallaxes. C) spectroscopic parallaxes. D) Cepheid variables. E) pulsars.