You put one ear on a steel railroad track while your friend a distance of 400 m away taps on the rail with a stone. You will hear the sound through the steel rail in _________ and through the air where the speed of sound is 344 m/s in _______
a. 0.08 s b. 0.5 s
c. 1.2 s d. 2.4 s
a, c
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According to the definition of “science” given in this chapter, which of the following do you think are sciences? Choose the letter of the first discipline on the list that you think is not a science. (The answer is open to debate!)
A. Geology B. Psychology C. Economics D. Anthropology E. Political Science F. Philosophy T. All are sciences
Where are the Trojan asteroids found?
A) orbiting Jupiter B) along Jupiter's orbit, 60° ahead of and behind Jupiter C) in the center of the asteroid belt D) on orbits that cross Earth's orbit E) on orbits that cross Mars's orbit
The largest volcano on Io, Loki, is similar in size, but a bit larger than
A) Texas. B) India. C) Mauna Kea. D) Maryland. E) Manhattan.
Consider the sun and its largest planet Jupiter. On the line joining them, how far from the center of the sun is their center mass?
Is it within or outside the sun? (Jupiter-sun distance is 778 × 106 km, diameter of the sun is 1.4 × 106 km, the sun is 1000 times as massive as Jupiter)