A unique property of water is that it ____
a. has a high heat capacity
b. can easily expand
c. has a high oxygen capacity
d. easily absorbs carbon monoxide
e. can mix with organic lipids
a
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___________ of the Milky Way contains mostly old (population II) stars and globular clusters
a. The disk component b. The spherical halo component c. The hydrogen gas in the disk d. The spiral arms e. Sgr A
What is the average power dissipated by a resistor of resistance R = 25 ? in an LRC circuit for which the power factor is equal to 0.25 and the maximum voltage of the AC source is 8 V?
A) 0.04 W B) 0.32 W C) 0.16 W D) 0.62 W E) 0.08 W
In the critical universe now proposed, the ratio of matter/energy is about:
A) 50:50. B) 27:73. C) 75:25. D) 10:90. E) 95:5.
If the distance between us and a star is doubled, with everything else remaining the same, the luminosity
A) is decreased by a factor of four, and the apparent brightness is decreased by a factor of four. B) is decreased by a factor of two, and the apparent brightness is decreased by a factor of two. C) remains the same, but the apparent brightness is decreased by a factor of two. D) remains the same, but the apparent brightness is decreased by a factor of four. E) is decreased by a factor of four, but the apparent brightness remains the same.