MCQ
Velocity of sound is maximum in
  • A
    Air
  • B
    Water
  • C
    Vacuum
  • Steel

Answer

Correct option: D.
Steel
d
(d) Velocity of sound in steel is maximum out of the given materials water and air.

In vacuum sound cannot travel, it's speed is zero.
 

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A rigid uniform bar $A B$ of length $L$ is slipping from its vertical position on a frictionless floor (as shown in the figure). At some instant of time, the angle made by the bar with the vortical is $\theta$. Which of the following statements about its motion is/are correct?

(image)

$[A]$ The midpoint of the bar will fall vertically downward

$[B]$ The trajectory of the point $\mathrm{A}$ is a parabola

$[C]$ Instantaneous torque about the point in contact with the floor is proportional to $\sin \theta$

$[D]$ When the bar makes an angle $\theta$ with the vertical, the displacement of its midpoint from the initial position is proportional to $(1-\cos \theta)$

If an emitter current is changed by $4\, mA ,$ the collector current changes by $3.5\, mA$. The value of $\beta$ will be
If a glass rod is dipped in mercury and withdrawn out, the mercury does not wet the rod because
Hydrogen atoms are excited from ground state to the principal quantum number 5 . Number of spectral lines observed will be
If power in $3\,\Omega $ is $27\,W$ then what is the power in $2\,\Omega $  ................ $\mathrm{W}$
A ball is dropped from a height of $20 \  m$ above the surface of water in a lake. The refractive index of water is $4/3$. A fish inside the lake, in the line of fall of the ball, is looking at the ball. At an instant, when the ball is $12.8\  m$ above the water surface the fish sees the speed of ball as........$m/s$ $[ g = 10\  m/s^2.]$
A thin rectangular magnet suspended freely has a period of oscillation equal to $T$. Now it is broken into two equal halves (each having half of the original length) and one piece is made to oscillate freely in the same field. If its period of oscillation is $T'$, the ratio $T'/T$ is :-
The radioactivity of a certain radioactive element drops to $1/64$ of its initial value in $30\, seconds$. Its half life is .........$seconds$
With a potentiometer null point were obtained at $140\, cm$ and $180\, cm$ with cells of $emf$ $1.1 \,V$ and one unknown $X\, volts$. Unknown $emf$ is .............. $V$
$250\; N$ force is required to raise $75 \;kg$ mass from a pulley. If rope is pulled $12 \;m$ then the load is lifted to $3 \;m$, the efficiency of pulley system will be ......$\%$