Gravity
Attraction between masses in this Newtonian model.
Glossary
Orbit
A path followed under gravity.
Velocity
Rate of position change with magnitude and direction.
Acceleration
Rate of velocity change in m/s².
Specific energy
Energy per unit mass in J/kg.
Electric charge
Source of electric interactions, measured in coulombs C.
Electric field
Force per unit positive test charge in N/C.
Superposition
Calculating linear contributions separately and adding them.
Potential
Potential energy per charge; J/C=V.
Magnetic field
A field exerting q(v×B) force on moving charges.
Amplitude
Maximum displacement from equilibrium.
Frequency
Cycles per second in Hz.
Wavelength
Distance between successive equal-phase points.
Phase
Angular position within a cycle in radians.
Node
A point of zero displacement amplitude in a standing wave.
Spectrum
A signal’s frequency components and their amplitudes.
Sampling
Measuring a signal at discrete time intervals.