What is the difference in frequency for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097 × 10^7 m-1.)
a. 5.65 × 10^-13 Hz
b. 31 Hz
c. 1.77 × 10^12 Hz
d. 2.55 × 10^16 Hz
e. 1.02 × 10^17 Hz
C
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RC Circuits: For the circuit shown in the figure, C = 13 µF and R = 7.6 M?. Initially the switch S is open with the capacitor charged to a voltage of 80 V. The switch is then closed at time t = 0.00 s. What is the charge on the capacitor 40 s after closing the switch? 
A. 3300 µC B. 3100 µC C. 2900 µC D. 2700 µC E. 2500 µC
A slit of width 0.010 mm has light of frequency 5.0 × 1014 Hz passing through it onto a screen 60 cm away. How wide is the central maximum? (c = 3.00 × 108 m/s)
A) 1.8 cm B) 0.12 cm C) 3.6 cm D) 7.2 cm E) 0.90 cm
Charge of uniform density 50 nC/m3 is distributed throughout the inside of a long nonconducting cylindrical rod (radius = 5.0 cm). Determine the magnitude of the potential difference of point A (2.0 cm from the axis of the rod) and point B (4.0 cm from the axis)
a. 2.7 V b. 2.0 V c. 2.4 V d. 1.7 V e. 3.4 V
To make a bomb based on the fission reaction work, one must at the time of detonation bring together an amount of fissionable material equal to or larger than the ________ mass.
Fill in the blank(s) with the appropriate word(s).