A 2.0 ?F capacitor is charged through a 50,000. ? resistor. How long does it take for the capacitor to reach 90% of full charge?
A) 2.19 s
B) 0.23 s
C) 0.9 s
D) 9.1 s
E) 2.3 s
B
Physics & Space Science
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The dominant mass of the solar system is the ______________
Fill in the blank(s) with correct word
Physics & Space Science
The most abundant gas in the Earth's atmosphere is
A) helium. B) nitrogen. C) hydrogen. D) oxygen. E) water vapor.
Physics & Space Science
Light with a frequency of 8.70 × 1014 Hz is incident on a metal that has a work function of 2.80 eV. What is the maximum kinetic energy that a photoelectron ejected in this process can have? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A) 8.7 × 10-19 J B) 3.1 × 10-19 J C) 1.3 × 10-19 J D) 2.4 × 10-19 J E) 4.5 × 10-19 J
Physics & Space Science
A Li2+ ion undergoes a transition from the n = 4 to the n = 3 state. The energy of the emitted photon is
a. 4.5 eV b. 10.2 eV c. 5.95 eV d. 2.6 eV e. 0.66 eV
Physics & Space Science