Two point charges, initially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between them?
A) 2.0 N
B) 4.0 N
C) 16 N
D) 1/4 N
E) 1/16 N
E
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There is a dislocation with a Burger’s vector between the origin of an FCC copper (Cu) crystal at 0,0,0 and the nearest lattice point in the (001) plane. The Cu lattice parameter is 0.362 nm.
(a) What is the Burger’s vector of this dislocation, in vector notation? (b) What is the magnitude of the Burger’s vector?
Why is there a two day difference in the sidereal and synodic months?
A) The Moon speeds up at perigee, and slows down at apogee. B) The sidereal day is four minutes shorter than the solar day, and it adds up. C) The Earth is closer to the Sun during the sidereal month. D) The Earth is also revolving around the Sun, so the Moon must "catch up". E) The Moslem lunar year is only 354 days long, on average.
Following selection rules for multi-electron atoms, imagine a titanium atom in the ground state with two electrons in each of the 3d and 4s shells. In the 3d shell, which of the following scenarios is least likely to be true?
Which of the following statements is false?
a. Energy can be converted from one form to another. b. Energy comes in different forms. c. Energy can be stored to a greater or lesser extent. d. Energy can be moved or transferred. e. Energy is constantly being destroyed by humans.