To achieve a low equivalent resistance for a pair of resistors, connect them in

A) series.
B) parallel.
C) either of these


Answer: B

Physics & Space Science

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Two radio antennas are 130 m apart on a north-south line. The two antennas radiate in phase at a frequency of 3.6 MHz. All radio measurements are made far from the antennas

The smallest angle, reckoned east of north from the antennas, at which constructive interference of two radio waves occurs, is closest to: A) 50° B) 55° C) 45° D) 40° E) 35°

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The number of cycles of a wave passing a point per unit time is the wave's __________

Fill in the blank(s) with correct word

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The Moon's crust is ________ km thick on the Earth side and ________ km thick on the far side

Fill in the blank(s) with correct word

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Power: A 100-W driveway light bulb is on 10 hours per day. If the power company charges 10¢ for each kilowatt-hour of electricity used, estimate the yearly cost to operate the bulb if it is used every day for a 365-day year.

A. $3.65 B. $7.30 C. $37 D. $73

Physics & Space Science