An object can move even when no force acts on it
1.True
2.False
1
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When a speeding roller-coaster car is at the bottom of a loop, the magnitude of the normal force exerted on the car’s wheels due to its interaction with the track is
A. Greater than the weight of the car and its passengers. B. Equal to the weight of the car and its passengers. C. Less than the weight of the car and its passengers.
What did the Huygens and Cassini probes find on the surface of Titan?
A) Rocks and no water B) Methane oceans C) An ocean and some lakes of methane, ethane, and other hydrocarbons D) Lakes and oceans of water E) No methane, no water; just rocks
Sometimes when you look into a curved mirror you see a magnified image (a great big you!) and sometimes you see a diminished image (a little you). If you look at the bottom (convex) side of a shiny spoon, what will you see?
A) You will either see a little you or a great big you, depending on how near you are to the spoon. B) You will see a little you, upside down. C) You will see a little you, right side up. D) You won't see an image of yourself because no image will be formed. E) You will see a little you, but whether you are right side up or upside down depends on how near you are to the spoon.
The light from an incandescent bulb is composed of
A. only red and blue. B. only red, green, and blue light. C. only red, yellow, and turquoise. D. all wavelengths in the visible portion of the electromagnetic spectrum. E. None of these choices are correct