The kinetic energy of a pendulum is greatest
a. when its potential energy is greatest.
b. at the top of its swing.
c. at the bottom of its swing.
d. when its total energy is greatest.
c
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Resonance in a series LRC circuit occurs when
A) XL is greater than XC. B) XC is greater than XL. C) (XL - XC)2 is greater than R2. D) (XL - XC)2 is equal to R2. E) XC equals XL.
The oldest evidence of life on Earth dates back to about how many years ago?
a. 65 million b. 3.8 million c. 3500 million d. 570 million
What is cosmic background radiation evidence for?
a. Dark matter. b. Dark energy. c. The Big Bang theory. d. The theory of relativity. e. Neutrino oscillations.
The pressure at the bottom of aquarium A is greater than that at the bottom of aquarium B. Why might this be?
a. A is filled with fresh water, B has the same amount of salt water. b. A is filled to a greater depth than B. c. A has greater volume than B. d. The bottom of aquarium A has smaller area than that of B. e. none of the above