something that does not change or cannot change or vary. physics . a number expressing a property, quantity, or relationship that remains unchanged under certain conditions.
what do you mean by constant?
Definition of constant (item 2 of 2): something immutable or unchanging: such as a: a number that has a fixed value in a particular situation or in general, or that is characteristic of a substance or instrument. b: a number that is assumed not to change in a given mathematical discussion.
Why do we use the constant in physics?
We need physical constants to transform the effects of nature into units of our choosing. The gravitational constant G converts the gravitational force between masses (in kg) at a given distance (in meters) into Newtons.
What is constant and variable?
A constant is a value that cannot be changed by the program during normal execution; H. the value is constant. … Compare this to a variable, which is an identifier with a value that can be changed during normal execution, i.e. the value is variable.
What is constant and variable in physics?
A variable is something whose value can change. … A constant is an unchanging quantity.