General physics

General physics

Terms realting to physics that are not fit for other subcategories.

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General physics

Stefan-Boltzmann law

Physics; General physics

The amount of energy radiated per second per unit area of a perfectly black body is directly proportional to the fourth power of the absolute temperature of the surface of the body.

Young's modulus of elasticity

Physics; General physics

The ratio of normal stress to the longitudinal strain produced in a body.

British thermal unit (Btu)

Physics; General physics

The amount of energy or heat needed to increase the temperature of one pound of water one degree Fahrenheit (abbreviated Btu).

On this scale, the ice-point (the lower fixed point) is taken as 273.15K and the (the upper fixed point) is taken as 373.15K. The interval between these two points is divided into 100 equal parts. ...

state of motion

Physics; General physics

When a body changes it's position with respect to a fixed point in it's surroundings then it is said to be in a state of motion. The states of rest and motion are relative to the frame of reference.

intensity

Physics; General physics

A measure of the energy carried by a wave.

state of rest

Physics; General physics

When a body does not change its position with respect to a fixed point in it's surrounding, then it is said to be in a state of rest. The states of rest and motion are relative to the frame of ...