Consider the circuit below. Switch S is closed at t = 0
7
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Is light a wave or a particle?
A. a wave B. a particle C. both a wave and a particle at the same time D. neither a wave nor a particle E. Sometimes it is a wave, other times it is a particle.
Science is a body of knowledge that extends back to
A) humankind's beginnings. B) Greece in the 7th century B.C. C) Italy in the 16th century. D) the time of Galileo.
A Tungsten w ire is 1.50 m long and has a diameter of 1.00 mm. At 20.°C a current of 50. mA flows through the wire. [?=5.6 × 10-8 ? ? m; ?=0.0045(C°)-1]
(a) Determine the potential across the wire. (b) If the wire temperature increases by 100. C°, what potential is now required to produce a current of 50. mA?
In Young's double-slit experiment, light was first passed through a narrow single slit before going on to the double-slits. The reason for the first slit was
A. to ensure a constant phase relationship between the interfering light waves. B. to polarize the light. C. to screen out all wavelengths except those in the visible light spectrum. D. to reduce the brightness of the light so the interference pattern could be seen.