Question

A tuning fork produces four beats per second
with 49cm and 50cm lengths of a stretched
wire of a sonometer. The frequency of the fork
is

1) 196 Hz
2) 296 Hz
3) 396 Hz
4) 693 Hz​

Answer 1

Explanation:

$\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}}{\color{pink}{:}}}}} \: \: \: </p><p></p><p>On \: top of that, wool hair fibres act as an insulator to trap the air inside the cloth, which helps stabilise your body temperature. Since air conducts heat, this means the warmth you might generate through exercise or general movement also gets trapped by wool, which keeps you even warmer.</p><p></p><p>$

Answer 2

Answer:

let say the frequency of the fork is f

and the speed of wave on the string is v

then according to question it gives 4 beats/s with the stretched wires of length 48 cm and 50 cm.

therefore,

v/2*48-f =4 ...(1)

and

f-v/2*50=4 ....(2)

on solving both the equations we get

f=396 HZ