Physics Questions

Which of the following is not a vector quantity?

In science a push or pull of an object is called ________.

What is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel?

Farad is unit of ___________.

Find the power of a convex lens if the image formed is at a distance of 16 cm from the lens when the object is placed on the other side of the lens at 20 cm from the optical centre?

Which phenomenon is responsible for the echo of sound wave?

A covex mirror of focal length f (in air) is immersed in a liquid (u=4/3). The focal length of the mirror in the liquid will be :

If the velocity of a body is halved its kinetic energy ________________.