You place a box on a smooth and evenly-sanded wooden board. Raise one end of the board so that the angle increases. Eventually, the box starts to slide along the board. If you maintain this angle of the board, the box
1.will move at constant speed along the ramp.
2.will do none of these.
3.will slow down and stop along the ramp.
4.will speed up along the ramp.
4
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According to our theory of solar system formation, why do we find some exceptions to the general rules and patterns of the planets?
A) Our theory is not quite correct because it cannot explain these exceptions. B) Most of the exceptions are the result of giant impacts or close gravitational encounters. C) The exceptions probably represent objects that formed recently, rather than early in the history of the solar system. D) The exceptions probably represent objects that were captured by our solar system from interstellar space. E) The exceptions are probably the result of the Sun passing very close to another star billions of years ago.
A positive object touches a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the leaves?
A) They separate further. B) They move closer together. C) They are unaffected. D) cannot be determined without further information
The spacecraft called Curiosity is
A) a rover on Mars. B) an orbiter studying Jupiter. C) a robotic lander on Venus. D) currently orbiting Saturn.
The Hertzsprung-Russell Diagram is a plot for stars using absolute magnitude versus temperature
a. True b. False Indicate whether the statement is true or false