In which of the following cases would you feel weightless?
A) while walking on the Moon
B) while falling from an airplane with your parachute open
C) while traveling through space in an accelerating rocket
D) while falling from a roof
E) none of the above
D
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Which is the correct order of the planets, moving from closest to the Sun to farthest from the Sun?
a. Mercury, Venus, Earth, Saturn, Mars, Jupiter, Neptune, Uranus b. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune c. Venus, Mercury, Mars, Earth, Saturn, Jupiter, Neptune, Uranus d. Mars, Venus, Earth, Mercury, Jupiter, Saturn, Uranus, Neptune e. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Uranus
Scientific Notation: Which of the following numbers is the smallest?
A. 15 × 10-3 B. 0.15 × 100 C. 0.00015 × 103 D. 0.00000015 × 106
Volcanoes that explode violently tend to have magmas of
a. high temperature and low silica content. b. high temperature and high silica content. c. low temperature and low silica content. d. low temperature and high silica content.
The frictional force of the floor on a large suitcase is least when the suitcase is
a. pushed by a force parallel to the floor. b. dragged by a force parallel to the floor. c. pulled by a force directed at an angle q above the floor. d. pushed by a force directed at an angle q into the floor. e. turned on its side and pushed by a force parallel to the floor.