Answer:
a. R2b = R/4
Explanation:
The total resistance of a metallic wire is given by the following formula:
R = ρL/A
where,
R = Resistance of Wire
ρ = Resistivity of the material of wire
L = Length of Wire
A = Area of Wire = πr²
Therefore,
R = ρL/πr²
for the 1st wire,
radius = r = b
Therefore,
R = ρL/πb² ----------- equation 1
Now, for the second wire,
r = 2b
Therefore,
R2b = ρL/π(2b)²
R2b = ρL/πb²4
using equation 1:
R2b = R/4
therefore, correct option is:
<u>a. R2b = R/4</u>
I did this.
If your answers look like this...
a. <span>models have the ability to communicate </span>
<span>b. </span><span>models have the ability to correctly predict all outcomes </span>
<span>c. </span>model have the ability to test predictions
<span>d. </span><span>models have the ability to save time
</span>Then it's D
If looters break a statue into pieces, the weathering of the pieces of rock will unfortunately weather faster because there is more surface area for the rock to weather.
A. Genus and B. Species are also major levels of classification.
-- <span>Does the width of a rubber band affect how far it will stretch?
-- How does the thickness of a material affect insulation?
You could take a guess at the answer to each of these,
and then test to see if your guess is correct.
</span>