MCQ
One Mach number is equal to
  • A
    Velocity of light
  • Velocity of sound $(332\,\,m/\sec )$
  • C
    $1\,\,km/\sec $
  • D
    $1\,m/\sec $

Answer

Correct option: B.
Velocity of sound $(332\,\,m/\sec )$
b
(b) Mach number $ = \frac{{{\rm{Velocity\, of\, object}}}}{{{\rm{Velocity \,of \,sound}}}}$.

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 ball is dropped from a bridge of $122.5$ metre above a river. After the ball has been falling for two seconds, a second ball is thrown straight down after it. Initial velocity of second ball so that both hit the water at the same time is ...... $m / s$
A thin wire of length $L$ and uniform linear mass density $\rho$ is bent into a circular loop with centre at $O$ as shown.  The moment of inertia of the loop about the axis $XX' $ is 
A circular loop carrying a current is replaced by ann equivalent magnetic dipole. A point on the axis of the loop is in:
The pressure $( P )$ and temperature $( T )$ relationship of an ideal gas obeys the equation $PT ^2=$ constant. The volume expansion coefficient of the gas will be:
The motion of planets in the solar system is an example of the conservation of 
A particle is revolving in a circle of radius $2\ m$ with angular velocity $\omega = t^2 -4t + 8\ rad/s$ . The time when speed of the particle becomes $8\ m/s$ is    ......... $\sec$
Which of the following has unit but no dimension?
The centre of mass of an extended body on the surface of the earth and its centre of gravity.
An electron is moving in a circle of radius $2 \,m$ with speed $4 \,m / s$ Find the acceleration of the electron. (in $m / s ^{2}$)
Consider two observers moving with respect to each other at a speed v along a straight line. They observe a bock of mass m moving a distancel on a rough surface. The following quantities will be same as observed by the two observers.