An object has gravitational potential energy due to its
A) speed.
B) acceleration.
C) momentum.
D) location.
E) none of the above
Answer: D
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The lowest energy level in an atom is its
a. ionization level b. emission level c. absorption level d. photon level e. ground state
Why is most matter electrically neutral?
a. It contains no charges. b. There are equal amounts of positive and negative charges present. c. The charge on the electrons and protons in the material is too small to notice. d. none of the above
A simple pendulum, 2.0 m in length, is released by a push when the support string is at an angle of 25° from the vertical. If the initial speed of the suspended mass is 3.0 m/s when at the release point, to what maximum angle will it move in the second half of its swing?
a. 36° c. 19° b. 30° d. 47°
Unlike atoms, molecules can:
A) rotate. B) vibrate. C) spin. D) Both A and B. E) All of the above.