Dividing the separation of two galaxies by their recession speed is a simple way to estimate
A. if the Universe is flat.
B. if the Universe contains dark matter.
C. the age of the Universe.
D. the temperature of the CMB.
E. the density of the Universe.
Answer: C
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On the day of the _______________ in late June, Earth's Northern Hemisphere is inclined toward the Sun
Fill in the blank(s) with correct word
Say that our Moon was Full on May 1, 2007. When was the next First Quarter phase after that Full Moon?
a) May 15 b) June 1 c) May 22 d) May 8 e) May 4
Find the net work done by friction on the body of a snake slithering in a complete circle of radius. The coefficient of friction between the ground and the snake is 0.25, and the snake's weight is
A) -330 J B) 0 J C) -3300 J D) -670 J
Isotopes have the same number of
A) protons and neutrons B) protons but a different number of electrons C) neutrons but a different number of protons D) protons but a different number of neutrons