Powers of Ten are used for measurements in Science. The thickness of thread would be expressed as a which Power of Ten? -1
0
-2
-3?

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.