Answer:
b it is b part answer i think so
- R=ρ×L/A
ρ=R×A/L
A=pie(r²)=pie(0.6²)=pie(0.36)=1.13
ρ=2ohm×1.13mm²/1500mm
ρ=0.0015ohm.mm
2. we were told that the wires were made of the same substance so the resistivity(ρ)is the same for both wires so:
R=ρ×L/A
R=0.0015ohm.mm×500mm/0.09mm²
R=8.3'ohm
so our resistance for the second wire is :
<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>R</em><em>=</em><em>8</em><em>.</em><em>3</em><em>'</em><em>ohm</em>
I would say that this passage is an example of the heliocentric correct view of the world with the sun and not the earth the center of our universe and this formed a very important part of the Renaissance wherein nature was examined first hand wherever possible to arrive at a much closer approximation of the truth than in Medieval or Classical times of Aristotle when idle speculation about nature was the order of the day.
