It's a group wave, or something that happens simultaneously. Unless the meaning you need is a fun little body wave! (: There's no rules but to jump out of your seat with your arms up!
I hope all is well, and this is what you were looking for! Good luck, rockstar! (:
Answer:
5.65 times
Explanation:
60 db sound is equal to 60 phons sound when frequency is kept at 1000Hz.
But when the frequency of sound is changed to 100 Hz , according to equal loudness curves , the loudness level on phon scale will be 35 phons.
A decrease of 10 phon on phon- scale makes sound 2 times less loud
Therefore a decrease of 25 phons will make loudness less intense by a factor equal to 2²°⁵ or 5.65 less intense . Therefore intensity at 100 Hz
must be increased 5.65 times so that its intensity matches intensity of 60 dB sound at 1000 Hz frequency.
Answer: Dr. William Herbert Sheldon
The Sheldon Coin Grading Scale is an internationally accepted, 70-point assessment of a coin's condition and quality. It was originally developed by Dr. William Herbert Sheldon in 1949 in order to grade large cents. His scale was slightly modified in the 1970s to account for a wider range of coins.
<span>A very rare type of lightning that appears as a reddish-colored sphere is called </span>A + Ball Lightening
M=400/1000=0.4kg h=17.3 g=9.8m/s2 P.E=mgh P.E=0.4(9.8)(17.3) P.E=67.8J