Asteroid 2004 MN4 is predicted to strike Earth in 2029
a. True
b. False
Indicate whether the statement is true or false
False
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According to Galileo, which of these is a "natural" or "unforced" motion?
A) A stone falling straight downward. B) A book coming to rest as it slides along the floor. C) Both of the above. D) Neither of the above.
Which of these is not accelerating?
A) a car starting up from rest B) a car while it is moving at unchanging speed up a straight [or steady] incline C) a car going over the crest of a rounded hill at a constant speed D) a car while it is rounding a corner at constant [or steady] speed E) actually all of these cars are accelerating
Your favorite radio station is located due north of your house and broadcasts using a horizontal electric dipole antenna directed north-south. To receive this signal you need to
A. move to a town that is farther to the east or west. B. use a magnetic dipole antenna instead of an electric dipole antenna. C. orient the receiving antenna horizontally north-south. D. use a vertical receiving antenna.
The density of a submerged submarine at rest is about the same as the density of
A) a crab. B) iron. C) a floating submarine. D) water. E) none of the above