A zero decibel sound level has zero amplitude
Indicate whether the statement is true or false
F
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According to Newton's laws, if an object is moving in a straight line with a constant speed:
A) it will continue to do so until it runs out of energy. B) it will continue to do so unless compelled by an outside force to do otherwise. C) it will move more and more slowly, in the same direction, until it comes to a complete stop. D) it will eventually come to a stop and reverse directions. E) it will gradually move faster and faster until it reaches the speed of light.
Name the layers of the Earth's atmosphere, going up from the surface
What will be an ideal response?
Why are things torn apart when they near a back hole?
A: The part of the object closer to the black hole feels a greater force B: Space itself is stretched around a black hole C: Black holes are after all cosmic vacuum cleaners D: The spin of a black hole causes objects to twirl around and stretch E: All the atoms in the object start acting as magnets and repel each other
The _____ is the average density of the Universe needed to make its curvature flat
A) relative density B) arithmetic density C) nuclear density D) critical density