When a switch is closed, completing an LR series circuit, the time needed for the current to reach one half its maximum value is ____ time constants
a. 0.250
b. 0.500
c. 0.693
d. 1.00
e. 1.44
C
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Asteroids are similar in composition, leading scientists to suspect that they formed from the breakup of a single large object, such as a planet
Indicate whether the statement is true or false
The Sun's path, as viewed from the equator, is highest in the sky on ________
A) the winter solstice B) the day when Earth is closest to the Sun C) the summer solstice D) the spring and fall equinoxes
Which stellar spectral type has the strongest molecular absorption lines in its visible light spectrum?
A) O B) B C) G D) K E) M
Molecular Speeds: The rms speed of a certain sample of carbon dioxide molecules, with a molecular weight of 44.0 g/mole, is 396 m/s. What is the rms speed of water vapor molecules, with a molecular weight of 18.0 g/mol, at the same temperature as the carbon dioxide?
A. 253 m/s B. 387 m/s C. 421 m/s D. 506 m/s E. 619 m/s