Which ancient astronomer recorded the magnitude of stars in his star catalog and was used successfully by astronomers for generations?
a. Ptolemy
b. Copernicus
c. Galileo
d. Kepler
e. Aristotle
a
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Which has the larger entropy: a gas that occupies only half of a container, with the other half a vacuum, or the same gas occupying the entire container?
What will be an ideal response?
An electron is in the ground state of an infinite well (a box) where its energy is 5.00 eV. In the next higher level, what would its energy be? (1 eV = 1.60 × 10-19 J)
A) 1.25 eV B) 10.0 eV C) 15.0 eV D) 20.0 eV E) 2.50 eV
The entropy of an isolated system never changes
Indicate whether the statement is true or false
Electric power is transmitted over long distances at high voltage because
A) electricity moves faster at higher voltage. B) the lines can be on taller poles. C) lightning does more damage. D) there is less power lost. E) electricity moves slower at higher voltage.