What is the equivalent resistance between points a and b?
a.
14 ?
b.
8.0 ?
c.
6.0 ?
d.
25 ?
e.
40 ?
d
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Photoelectric Effect Using Stopping Potential: When light of wavelength 350 nm is incident on a metal surface, the stopping potential of the photoelectrons is measured to be 0.500 V. What is the work function of this metal? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 0.500 eV B. 3.05 eV C. 3.54 eV D. 4.12 eV
________ is the study of the universe, including its properties, structure, and evolution
Fill in the blank(s) with the appropriate word(s)
Write the equation of a wave, traveling along the +x axis with an amplitude of 0.02 m, a frequency of 440 Hz, and a speed of 330 m/sec.
A. y = 0.02 sin [880?(x/330 ?t)] B. y = 0.02 cos [880?x/330 ? 440t] C. y = 0.02 sin [880?(x/330 + t)] D. y = 0.02 sin [2?(x/330 + 440t)] E. y = 0.02 cos [2?(x/330 + 440t)]
If a force always acts perpendicular to an object's direction of motion, that force cannot change the object's kinetic energy
A) True B) False