Physics Questions

An example of longitudinal waves (in gas as a medium) is ______.

If the radius of the earth decreases and its mass remains the same, then the value of "acceleration due to gravity" will _____ .

During which of the following operating conditions of an automobile, carbon monoxide content in exhaust gas is maximum?

Unit of impedance is ___________.

Find the power of a convex lens if the image formed is at a distance of 20 cm from the lens when the object is placed on the other side of the lens at 25 cm from the optical centre?

If the angle of incidence formed on a concave mirror at a point is 30 deg then the angle of reflection will be

A Sonar of a ship sends sounds waves of speed 1000 m/s. These waves are reflected back by the ocean floor in 2 seconds. Find the depth (in m) of theocean floor. 

Fuse wire is made of an alloy of