Consider a situation where two moving objects collide, stick to each other, and move off together. The energy stored in a pile driver is an example of gravitational potential energy

Indicate whether the statement is true or false


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Physics & Space Science

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Three pith balls supported by insulating threads hang from a support. We know that ball X is positively charged. When ball X is brought near balls Y and Z without touching them, it attracts Y and repels Z. Since pith is an insulating material, we can conclude that

A. Y has a negative charge. B. Z has a negative charge. C. Y has a positive charge. D. Z has a positive charge. E. Z is neutral (has no net charge).

Physics & Space Science

The photons having least energy are those of

A) infrared. B) red light. C) green light. D) blue light. E) ultraviolet.

Physics & Space Science

A 1-kg mass at the Earth's surface weighs

A) 1 N. B) 5 N. C) 10 N. D) 12 N. E) none of the above

Physics & Space Science

A black hole has

A) about the same mass as the original star from which it formed. B) infinite mass. C) about half the mass of the star from which it formed. D) a mass that widely fluctuates.

Physics & Space Science