The Pauli exclusion principle tells us that no two electrons in an atom can have the same quantum number(s)
A)
n, ?, m?, and ms.
B)
n, ? and m?.
C)
m? and ms.
D)
n and ?.
E)
n.
A
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Teflon tubing or 4 cm OD and 2.7 cm ID conducts 1.9 W/m when the outside temperature is 80ºC. Estimate the inside temperature of the tubing. Also predict the thermal resistance per unit length.
What will be an ideal response?
A basketball player jumps to make a basket and remains in the air for a moment. A sportscaster then remarks that she has "defied gravity." Which of the following accurately describes the situation?
A) The player did stay in the air in spite of the Law of Gravitation, but a single counter-observation is not enough to warrant revisiting a theory that usually works. B) The player produced enough force with her legs to accelerate upward and remains above ground only until the acceleration of gravity brought her back down. C) The player can "defy gravity" because the Universal Law of Gravitation makes an exception for basketball players. D) The player has defied gravity, so scientists must go back into the lab to refine their theory.
At the Earth's surface, approximately 1000 W/m2 is present due to solar radiation. At a latitude of 44.5 degrees North, the angle of the sun’s rays, when the sun is highest in the sky on the winter solstice, are incident at an angle of 68 degrees from the vertical. What power is incident upon a 1.0 m x 1.5 m window in a vertical, south-facing wall at this time?
A. 1390 W B. 930 W C. 560 W D. 370 W
An ideal gas is allowed to undergo a free expansion. If its initial volume is V1 and its final volume is V2, the change in entropy is
A. nR ln (V2/V1) B. nRT ln (V2/V1) C. nk ln (V2/V1) D. 0 E. nR V2/V1