In a circuit involving resistance and capacitance, which of the following choices would result in the longest time constant?
a. R = 100 ?, C = 30 ?F b. R = 300 ?, C = 150 ?F
c. R = 75 ?, C = 75 ?F d. R = 200 ?, C = 200 ?F
b
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In the Lighthouse Model,
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When you stand in front of a convex mirror, the image you see is
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Wood does not have magnetic properties because it contains no
A) iron or other metals. B) magnetic domains. C) moving electrons. D) none of the above
An object is not accelerated if
A) it is acted upon by an external influence. B) its speed remains unchanged while its direction of motion changes. C) its speed and its direction of motion are both unchanging. D) its speed changes while its direction of motion remains unchanged. E) both answers B and D are correct.