A pen contains a spring with a spring constant of 257 N/m. When the tip of the pen is in its retracted position, the spring is c
ompressed 5.1 mm from its unstrained length. In order to push the tip out and lock it into its writing position, the spring must be compressed an additional 6.1 mm. How much work is done by the spring force to ready the pen for writing
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Answer:
Amplitude is decreased by a factor of if intensity is decreased by a factor of 3.
Explanation:
Intensity of a sound wave is directly proportional to the square of its amplitude.
Therefore, if intensity is and amplitude is
, then
, where,
is constant of proportionality.
Now, if intensity of sound wave is decreased by a factor of 3. So,
New intensity is,
Plug in for
. This gives,
Therefore, amplitude is decreased by a factor of .