Defs of Physics

Electron

A subatomic particle that has a negative charge

Proton

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

Neutron

A subatomic particle that has no charge and that is found in the nucleus of an atom

Entropy

A measure of disorder or randomness.

Enthalpy

The heat content of a system at constant pressure

Quarks

particles of matter that make up protons and neutrons

Leptons

Any of a family of particles like electrons and neutrinos

Neutrinos

One of the by-products of the proton-proton chain are these weird particles that can go through anything called

Amount of substance

mole (mol)

electric current

ampere

luminous Intensity

candela (cd)

Frequency

Hertz (Hz)

Force

Newton

Pressure

Pascal

Energy

Joule (J)

power

Watt (W)

Electric charge

Coulomb

capacitance

farad

electric potential difference

volt

electric resistance

ohm

Magnetic Flux

weber

Magnetic Flux Density

tesla

Luminous Flux

lumen

Radioactivity

becquerel

Inductance

Henry

distance from the Sun to an astronomical object

parsec

Measures atmospheric pressure

barometer

Measures Latitude

sextant

torque

the rotational equivalent of linear force

Acceleration

rate of change of the velocity of an object with respect to time.

velocity

directional speed of an object in motion

momentum

the product of the mass and velocity of an object.

inertia

a tendency to do nothing or to remain unchanged

spin

the total angular momentum, or intrinsic angular momentum, of a body.

HNO₃

Nitric acid

Alpha Particles

2 protons 2 neutrons, or a helium nucleus

Beta Particles

Radiation composed of electrons

photon

light particle

work

movement of an object against a force