The greatest red shifts are observed for those galaxies that are
A. near our galactic equator.
B. the brightest.
C. nearest our galaxy.
D. at the greatest distance from us.
Answer: D
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Type II supernovae are believed to occur when the cores of massive stars collapse
Indicate whether the statement is true or false
The Earth is 1.49 × 10^11 meters from the sun. If the solar radiation at the top of the Earth's atmosphere is 1 340 W/m2, what is the total power output of the sun?
a. 7.10 × 10^27 W b. 2.20 × 10^30 W c. 6.62 × 10^26 W d. 3.74 × 10^26 W e. 2.98 × 10^25 W
In a polyethylene long-chain molecule, the carbon-carbon and hydrogen-carbon bonds are all ______________bonds.
Fill in the blank(s) with the appropriate word(s).
An object moving in a circle undergoes centripetal acceleration
Indicate whether the statement is true or false