SOLUTION: A phonograph record is 12" across.
An outer non-playing area 1" in width.
A non-playing central area 4" in diameter.
An average of 90 grooves per in.
Determine distance the n
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Question 985121: A phonograph record is 12" across.
An outer non-playing area 1" in width.
A non-playing central area 4" in diameter.
An average of 90 grooves per in.
Determine distance the needle travels when the record plays once.
12 - 1 - 4 = 7"
I don't think that is correct. Where did I make the error(s)?
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
.
The needle travels across the radius, not diameter.
12" diameter=6" radius
6" - (1" wide non-playing area) - (2" non-playing central radius) = 3 inches
ANSWER: The needle travels 3 inches.
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