An AC voltage source, with a peak output of 114 V, is connected to a 40.0-? resistor. What is the effective (or rms) current in the circuit?
a. 2.02 A
b. 1.43 A
c. 2.85 A
d. 4.03 A
e. 5.70 A
a
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The geological feature in this photo is
A) an impact crater. B) a volcano. C) the unusual cloud formation in the background. D) a dried up lake basin.
A 70-kg laboratory technician absorbs 2.9 mJ of 0.50-MeV gamma rays in a workday. How many gamma-ray photons does the technician absorb in a workday?
A) 3.6 × 1010 B) 3.6 × 109 C) 3.6 × 108 D) 1.0 × 109 E) 1.0 × 108
The most abundant molecule in Saturn's atmosphere is ________
Fill in the blank(s) with correct word
A stopping potential of 0.50 V is required when a phototube is illuminated with monochromatic light of wavelength 590 nm
Monochromatic light of a different wavelength is now shown on the tube, and the stopping potential is measured to be 2.30 V. What is the wavelength of this new light? (c = 3.00 × 108 m/s, e = - 1.60 × 10-19 C, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 320 nm B) 300 nm C) 340 nm D) 360 nm E) 410 nm