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Law of refraction
refractive index, n = sin i / sin r
Law of reflection
the angle of incidence = the angle of reflection
Boyle's Law (at a constant temperature)
p1 x V1 = p2 x V2
Boyle's Law (at a constant volume)
p1 / T1 = p2 / T2
Convert temperature (celsius) into kelvin
add 273 to the celsius temperature
Simple rules of magnetism
like poles repel, unlike poles attract
Condition for balance
sum of clockwise moments = sum of anticlockwise moments
Convert temperature (kelvin) into celsius
subtract 273 from the kelvin temperature