To help prevent tooth decay, public water distribution systems add _____
a. chlorine
b. alum
c. fluoride
d. activated carbon
c
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The expansion valve in an A/C system converts the high-pressure liquid into a:
A. low-pressure liquid. B. low-pressure vapor. C. high-pressure liquid. D. high-pressure vapor.
The word photography means "drawing or writing with _____."
a. pixels b. light c. megapixels d. data
In a combination circuit, to identify series and parallel elements, you should _____.
A. trace the current path(s) B. trace the voltage path(s) C. calculate the total resistance D. calculate the total current
According to ____________________ law, if the current is reduced by half and circuit resistance remains the same, the amount of energy lost is reduced by 75 percent.
Fill in the blank(s) with the appropriate word(s).