How long will it take a charged 80-?F capacitor to lose 20% of its initial energy when it is allowed to discharge through a 45-? resistor?
a. 0.92 ms
b. 0.64 ms
c. 0.40 ms
d. 0.19 ms
e. 0.80 ms
c
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In solid-solution strengthened metals, substitutional and interstitial solid-solution atoms interact with _________dislocations in the metal.
Fill in the blank(s) with the appropriate word(s).
If you connect two identical bulbs to one battery in a series circuit instead of connecting the bulbs in parallel:
a. the first bulb will be brighter than the second one in the series circuit. b. each bulb is brighter in series than in parallel. c. each bulb is dimmer in series than in parallel. d. the bulbs glow just as brightly in series as in parallel. e. the battery lasts longer for the bulbs in parallel.
____________________ made very accurate observations of the positions and movements of the planets that were later used to help develop the Rudolphine Tables
Fill in the blank(s) with correct word
Assuming a pupil diameter of 3. mm, what is the angular resolution of the human eye at the middle of the visible spectrum (550. nm)?
A) 0.8 degree B) 0.8 arc-minute C) 0.2 degree D) 0.2 arc-minute E) 2. milliradian