The midpoint of a piano string of tension T, density rho, and length l is hit by a hammer whose head diameter is 2a. A tiny ﬂy is sitting at a distance l/4 from one end. (Assume that a < l/4; otherwise, the ﬂy may be struck!) How long does it take for the disturbance to reach the ﬂy

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Ответ:

shortyyashaun

30.08.2021

Mathematics

1 , 3 , 4

Step-by-step explanation:

${8}^{7} \: . \: {8}^{ - 12} \\ = {8}^{7 + ( - 12)} \\ = {8}^{ - 5} \\ = \frac{1}{ {8}^{5} } \\2)[tex] \frac{ {7}^{4} }{ {7}^{ - 3} } \\ = {7}^{4 - ( - 3)} \\ = {7}^{4 + 3} \\ = {7}^{7} \\3)[tex] { (\frac{1}{3} )}^{2} . \: {( \frac{1}{3} )}^{9} \\ { (\frac{1}{3}) }^{2 + 9} \\ { (\frac{1}{3} )}^{11} \\$

$\frac{ {( - 5)}^{6} }{ {( - 5)}^{10} } \\ = {( - 5)}^{6 - 10} \\ = {( - 5)}^{ - 4} \\ = \frac{1}{ {( - 5)}^{4} } \\$

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