The correct sequence of spectral type letters from hot on the left to cool on the right is

a. M, K, G, F, A, B, O b. O, B, A, F, G, K, M
c. G, K, M, F, O, B, A d. A, B, O, F, G, K, M


b

Physics & Space Science

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Which of the following terms is given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts?

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On average, active galaxies are rare and most are fairly distant from us

Indicate whether the statement is true or false

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We live in the ______________ epoch

Fill in the blank(s) with correct word

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A right triangle has sides 5 m, 12 m, and 13 m. What is the sine of the smallest angle of this triangle?

1.12/5 2.5/12 3.5/13 4.12/13

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