A star's absolute brightness is calculated at a standard distance of 10 parsecs
a. True
b. False
Indicate whether the statement is true or false
True
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The wavelength of a wave is
A) how strong the wave is. B) the distance between a peak of the wave and the next trough. C) the distance between two adjacent peaks of the wave. D) the distance between where the wave is emitted and where it is absorbed. E) equal to the speed of the wave times the wave's frequency.
The length of a certain wire is doubled and at the same time its radius is also doubled. What is the new resistance of this wire?
A) It stays the same. B) It is 2 times as large. C) It is 4 times as large. D) It is ½ as large. E) It is ¼ as large.
A rock falls from a vertical cliff that is 4.0 m tall and experiences no significant air resistance as it falls. At what speed will its gravitational potential energy (relative to the base of the cliff) be equal to its kinetic energy?
A) 3.1 m/s B) 4.4 m/s C) 6.3 m/s D) 8.9 m/s E) 13 m/s
A gas consisting of 20.0 moles of monatomic ideal gas has a change in entropy of 200 J/K when taken through a process that starts at with a volume of 6.00 m3 at 300 K and ends with a volume 2.00 m3
The molar specific heat of the gas is 3R/2 for constant volume processes. What is the final temperature of the gas? A) 680 K B) 2780 K C) 1860 K D) 100 K E) 1390 K