S: (n) chaos (the formless and disordered state of matter before the creation of the cosmos)
S: (n) cloud (any collection of particles (e.g., smoke or dust) or gases that is visible)
S: (n) decalescence (phenomenon that occurs when a metal is being heated and there is a sudden slowing in the rate of temperature increase; slowing is caused by a change in the internal crystal structure of the metal)
S: (n) electricity (a physical phenomenon associated with stationary or moving electrons and protons)
S: (n) energy (any source of usable power) "the DOE is responsible for maintaining the energy policy"
S: (n) energy, free energy ((physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs) "energy can take a wide variety of forms"
S: (n) power ((physics) the rate of doing work; measured in watts (= joules/second))
S: (n) event (a phenomenon located at a single point in space-time; the fundamental observational entity in relativity theory)
S: (n) field, field of force, force field (the space around a radiating body within which its electromagnetic oscillations can exert force on another similar body not in contact with it)
S: (n) force ((physics) the influence that produces a change in a physical quantity) "force equals mass times acceleration"
S: (n) hysteresis (the lagging of an effect behind its cause; especially the phenomenon in which the magnetic induction of a ferromagnetic material lags behind the changing magnetic field)
S: (n) resonance (an excited state of a stable particle causing a sharp maximum in the probability of absorption of electromagnetic radiation)
S: (n) pressure, pressure level, force per unit area (the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit)) "the compressed gas exerts an increased pressure"
S: (n) reflection, reflexion (the phenomenon of a propagating wave (light or sound) being thrown back from a surface)
S: (n) refraction (the change in direction of a propagating wave (light or sound) when passing from one medium to another)
S: (n) resolving power, resolution (the ability of a microscope or telescope to measure the angular separation of images that are close together)
S: (n) resolution ((computer science) the number of pixels per square inch on a computer-generated display; the greater the resolution, the better the picture)
S: (n) interaction, fundamental interaction ((physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons)
S: (n) surface tension (a phenomenon at the surface of a liquid caused by intermolecular forces)
S: (n) syzygy (the straight line configuration of 3 celestial bodies (as the sun and earth and moon) in a gravitational system)