Electric potential and electric potential energy are _
A. one and the same in most cases
B. two terms for the same concept
C. both of these answers
D. neither of these answers
Ans: D. neither of these answers
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The expansion of a star to giant or supergiant size _____, and so the stars move toward the upper right in the Hertzsprung-Russell (H-R) diagram
A) contracts the star drastically B) cools the star's outer layers C) dims the star D) makes the star less luminous
When two point charges are 2.0 cm apart, each one experiences a 1.0-N electric force due to the other charge. If they are moved to a new separation of 8.0 cm, the electric force on each of them is closest to
A) 16 N. B) 0.063 N. C) 1.0 N. D) 4.0 N. E) 0.25 N.
An electron is bound in an infinite well (a box) of width 0.10 nm
If the electron is initially in the n = 8 state and falls to the n = 7 state, find the wavelength of the emitted photon. (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg)
The center of our galaxy is believed to be occupied by the radio source known as ____________________
Fill in the blank(s) with correct word