Question

solve this urgent please​

Answer 1

Explanation:

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Answer 2

We have the expression for frequency.

$\sf{\nu=\dfrac {1}{2\pi}\sqrt {\dfrac {g}{l}}}$

From this we get,

$\sf{\nu\propto\dfrac {1}{\sqrt l}}$

Then we get the following equation,

$\sf{\dfrac {\nu_2}{\nu_1}=\sqrt {\dfrac {l_1}{l_2}}}$

In the first case, $\sf{l_1=1\ m.}$

In the second case, $\sf{l_2=1-\dfrac {1}{4}=\dfrac {3}{4}\ m.}$

Hence,

$\sf{\underline {\underline {\dfrac {\nu_2}{\nu_1}=\dfrac {2}{\sqrt3}}}}$