The temperature of outer space is

A) zero.
B) about 2.7 kelvin.
C) meaningless.
D) none of the above


Answer: B

Physics & Space Science

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For stars on the main sequence, the luminosity can be estimated by the formula L = ____________________

Fill in the blank(s) with correct word

Physics & Space Science

Which of these is NOT now on the surface of Mars?

A) Mars Global Surveyor B) Viking 1 C) Pathfinder D) Sojourner E) Spirit

Physics & Space Science

Three pith balls supported by insulating threads hang from a support. We know that ball X is positively charged. When ball X is brought near balls Y and Z without touching them, it attracts Y and repels Z. Since pith is an insulating material, we can conclude that

A. Y has a negative charge. B. Z has a negative charge. C. Y has a positive charge. D. Z has a positive charge. E. Z is neutral (has no net charge).

Physics & Space Science

When strong solar winds are displaced poleward by our magnetic fields, we get:

A) the Van Allen radiation belts. B) intense auroral displays. C) sunspots. D) hurricanes in the tropics. E) droughts and dust bowls in the American West.

Physics & Space Science