The Wilkinson Mapping Project gave:

A) ?o = 1, but matter (dark and visible) is only 27% of this, the rest is dark energy.
B) a closed universe, where dark matter triumphs over dark energy.
C) an exact picture of the nature of dark energy.
D) us proof that 90% of matter is dark, only 10% normal.
E) the background cosmic temperature is 4.36 K.


A

Physics & Space Science

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Fill in the blank(s) with the appropriate word(s).

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The diagram illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see an absorption spectrum?

image

a. 1
b. 2
c. 3
d. 2 and 3
e. none of them

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Fill in the blank(s) with the appropriate word(s).

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What is the magnitude of the average velocity of the car? A) 12.7 m/s B) 13.7 m/s C) 16.1 m/s D) 18.3 m/s E) 17.2 m/s

Physics & Space Science