The resistivity of pure copper is 17 nano-Ohm-meters. How many times more resistive than copper is the nickel-chrome wire used in this experiment? (In other words, calculate the ratio of these resistivity values)

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The resistivity of pure copper is 17 nano-Ohm-meters. How many times more resistive than copper is the nickel-chrome wire used in this experiment? (In other words, calculate the ratio of these resistivity values, resistivity of nickel-chrome = 1126 nano-Ohm-meters)

nickel chrome wire  is 66.24 nano-Ohms-meters more resistive than copper wire.

Explanation:

When you compare the resistivity of two substances, you can  determine the one that conducts electricity more. Resistivity is related to the resistance of a substance with the expression below;

R =ρl/A

where R is the resistance

ρ is the resistivity

l is the length of material

A is the area

Given that

is the resistivity of copper = 17 nano-Ohm-meters

is the resistivity of nickel-chrome = 1126 nano-Ohm-meters

Calculating for the ratio

The ratio compares two quantities, and we are comparing the resistivities of Nickel-chrome to copper. Nickel-chrome is more resistive to copper, comparing their resistivities we have;

   = 66.24 nano-Ohms-meter

This means that nickel-chrome wire is 66.24 nano-Ohms-meters more resistive than copper wire.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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