299,792,458 m/s speed of light
Sound travels at 343.2 m/s in air; it travels at 1,484 m/s in water (4.3 times as fast as in air)
Relativity
the dependence of various physical phenomena on relative motion of the observer and the observed objects, especially regarding the nature and behaviour of light, space, time, and gravity.
Gravity
the force that attracts a body towards the centre of the earth, or towards any other physical body having mass.
Mest
Matter
Energy
Space
Time
Communication withholding
Genetic entity
Electron - positrons
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