You slam on the brakes of your car in a panic, and skid a certain distance on a straight, level road. If you had been traveling twice as fast, what distance would the car have skidded, under identical conditions?
A) It would have skidded 4 times farther.
B) It would have skidded 2 times farther.
C) It would have skidded times farther.
D) It would have skidded 1/ times farther.
E) It would have skidded 1/2 as far.
Answer: A
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Viewed from Pluto, the Sun would appear more than a thousand times fainter than on Earth
Indicate whether the statement is true or false
The text states that luminous matter in the Milky Way seems to be much like the tip of an iceberg. This refers to the idea that
A) luminous matter emits white light, much like the light reflected from icebergs. B) black holes are much more interesting than ordinary stars that give off light. C) dark matter represents much more mass and extends much further from the galactic center than the visible stars of the Milky Way. D) the luminous matter of the Milky Way is essentially floating on the surface of a great sea of dark matter.
The lunar mare are found:
A) anywhere large meteor impacts created deep basins. B) almost entirely on the far side, which was more likely to be hit. C) almost entirely on Earth side, where the crust was thinner. D) mainly in the south polar region, where the largest impact occurred. E) not at all, since no liquid water really exists on the Moon.
Two identical springs with spring constant 50 N/m support a 5.0-N weight as in the picture below. What is the tension in spring A?
?
?
A. 1.45 N B. 2.50 N C. 2.89 N D. 3.75 N E. 5.00 N