Is it possible for the total mechanical energy of a moving particle to be negative?
a. No, because a moving particle has positive kinetic energy.
b. No, because potential energy cannot have a value more negative than the value of the positive kinetic energy of the particle.
c. Only if friction is involved. d. Yes
D
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When multiplying and/or dividing quantities, you should report
a. the result rounded to the same number of digits as there are in the quantity with the greatest number of significant figures. b. all the digits that show on your calculator. c. only whole numbers. d. the result rounded to the same number of digits as there are in the quantity with the least number of significant figures.
If the air temperature decreases, how does the resonant frequency in a pipe closed at one end change?
a. It increases. b. It decreases. c. It doesn't change since one end of the pipe is closed. d. It doesn't change because resonance is pressure phenomenon.
A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5 sin (pt + p/3). The phase (in rad) of the motion at t = 2 s is
a. 7p/3 b. p/3 c. p d. 5p/3 e. 2p
The theory that different forms of animals throughout Earth's past occurred in a definite order is called the principle of
A) fossil assemblage. B) faunal succession. C) conformable fossils. D) fossil determination.