The interstellar medium is made of ___ % dust and ___ % gas
a. 1, 99 b. 0, 100
c. 100, 0 d. 5, 95
a
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During which type of lunar eclipse does the Moon remain longest in the Earth’s shadow?
A. penumbral B. partial C. total D. For all three types of eclipse, the Moon remains in the Earth’s shadow the same length of time. E. none of the above is accurate
Like Earth, Jupiter's internal energy is generated chiefly by radioactive decay
Indicate whether the statement is true or false
A 60. kg person walks along a 100. kg log at the rate of 0.8 m/s (with respect to the log). With what speed does the log move, with respect to the shore?
What will be an ideal response?
Why does the intensity of waves from a small source decrease with the square of the distance from the source?
A) The waves run out of energy as they travel. B) The waves spread out as they travel. C) The medium through which the waves travel absorbs the energy of the waves. D) The waves slow down as they travel away from the source. E) The frequency of the waves decreases as they get farther from the source.