(a) A force of 15 N applied to a spring compresses it by 4 cm. What is the potential energy of the spring in the compressed position?
(b) A force of 15 N applied to a spring stretches it by 4 cm. What is the potential energy of the spring in the stretched position?
(a) 0.3 J
(b) 0.3 J
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a. Henrietta Leavitt b. Edwin Hubble c. John Glenn d. Carl Sagan e. Harlow Shapley
An isotope is simply an atom that
A) is electrically charged. B) has different numbers of neutrons for the same element. C) both of these D) neither of these
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a. 28.3 MeV given off b. 20.7 MeV added c. 20.7 MeV given off d. 28.3 MeV added
The age of the solar system is believed to be approximately 4.6 billion years based on the data from
a. samples of lunar rocks. b. samples of Earth rocks. c. samples of meteorites. d. all of the above e. none of the above