A black hole is
A) a region of space that is collapsed in on itself.
B) the result of the collapse of supergiant star.
C) likely found at the center of each spiral galaxy.
D) All of the above
Answer: D
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Which of the following lists the planets of our solar system in the correct order from closest to farthest from the Sun?
A) Earth, Mars, Mercury, Venus, Jupiter, Saturn, Uranus, Neptune B) Mercury, Earth, Venus, Mars, Jupiter, Saturn, Neptune, Uranus C) Mercury, Venus, Mars, Earth, Saturn, Jupiter, Neptune, Uranus D) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
The increase in the amount of carbon dioxide in the atmosphere is responsible for __________
Fill in the blank(s) with correct word
A block of ice slides freely [no air resistance, no friction] down a slippery slope
The block starts from rest at the top of the slope, where it has a vertical height of 4 m above the bottom of the slope and where it has a gravitational energy of 1000 J. The block's total energy a quarter of the way down the slope [at a height of 3 m] is A) 250 J. B) 500 J. C) 750 J. D) 1000 J. E) greater than 1000 J.
Two particles, each having a mass of 3.0 ?g and having equal but opposite charges of magnitude of 6.0 nC, are released simultaneously from rest when they are a very large distance apart. What distance separates the two at the instant when each has a speed of 5.0 m/s?
a. 4.3 mm b. 8.6 mm c. 7.3 mm d. 5.6 mm e. 2.2 mm