The shiny liquid metal in the thermometer is

Heat is a form of

Which of the following is the S.I unit of energy?

Which of the following  is denoted by P.?

In a concave mirror, if the object is at the focus, the image is

A spherical mirror in which the outer surface is reflecting is called a

Temperature is measured using a

A very narrow tube in a thermometer is called a

In a concave mirror, if the object is at infinity then the image formed is  at

An image formed by a plane mirror is a/an