Embibe Experts Solutions for Exercise 2: EXERCISE 14.2

When the temperature of a gas at temperature $T$ is increased by $400 \mathrm{K}$, the velocity of gas becomes $\sqrt{2}$ times the initial value at temperature $T$. The value of $T$ is

The displacement $\left(y\right)$ and time $\left(t\right)$ graph for two sound waves is shown in figure. The ratio of their intensities is

If the sound level at a point $10 \mathrm{m}$ from the point source is $20 \mathrm{dB}$, then the sound level at distance $20 \mathrm{m}$ from the same source will be about

Both the strings, shown in the figure, are made of the same material and have the same cross-section. The pulleys are light. The wave speed of a transverse wave in the string $AB$ is $v_1$ and in $CD$ it is $v_2.$ Then $\frac{v_1}{v_2}$ is

Two strings $A$ and $B$, made of same material, are stretched by same tension. The radius of string $A$ is double of the radius of $B$. A transverse wave travels on $A$ with speed $v_{\mathrm{A}}$ and on $B$ with speed $v_{\mathrm{B}}.$ The ratio $\frac{v_{\mathrm{A}}}{v_{\mathrm{B}}}$ is

Four sources of sound each of sound level $10 \mathrm{dB}$ are sounded together in phase, the resultant intensity level will be $\left({\log }_{10}2=0.3010\right)$