# Classical vs Quantum Mechanics

by NutriGrainKiller
Tags: classical, mechanics, quantum
In Planck units the speed of light is always 1 Planck length per Planck time. if some God somehow changes $$c$$, it's still 1 Planck length per Planck time. so the question is: "why is there 5.39121 x 10-44 seconds in a Planck Times and why is there 1.61624 x 10-35 meters in a Planck length? in other words, why did we choose our unit time and unit length to have the reciprocals of those two numbers -- to have that many Planck times in a second and to have that many Planck lengths in a meter?
now, i don't know why an atom's size is approximately $$10^{25} l_P \$$, but it is, or why biological cells are about $$10^{5} \$$ bigger than an atom, but they are, or why we are about $$10^{5} \$$ bigger than the cells, but we are and if any of those dimensionless ratios changed, life would be different. but if none of those ratios changed, nor any other ratio of like dimensioned physical quantity, we would still be about as big as $$10^{35} l_P \$$, our clocks would tick about once every $$10^{44} t_P \$$, and, by definition, we would always perceive the speed of light to be $$c = \frac{1 l_P}{1 t_P} \$$ which is the same as how we do now, no matter if it could conceptually be changed to another speed.