Answer:
(a) Current is 2831.93 A
(b) ![8.40A/m^2](https://tex.z-dn.net/?f=8.40A%2Fm%5E2)
(c) ![\rho =15.52\times 10^{-9}ohm-m](https://tex.z-dn.net/?f=%5Crho%20%3D15.52%5Ctimes%2010%5E%7B-9%7Dohm-m)
Explanation:
Length of wire l = 3.22 m
Diameter of wire d = 7.32 mm = 0.00732 m
Cross sectional area of wire
![A=\pi r^2=3.14\times 0.00366^2=4.20\times 10^{-5}m^2](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E2%3D3.14%5Ctimes%200.00366%5E2%3D4.20%5Ctimes%2010%5E%7B-5%7Dm%5E2)
Resistance ![R=11.9mohm=11.9\times 10^{-3}ohm](https://tex.z-dn.net/?f=R%3D11.9mohm%3D11.9%5Ctimes%2010%5E%7B-3%7Dohm)
Potential difference V = 33.7 volt
(A) current is equal to
![i=\frac{V}{R}=\frac{33.7}{11.9\times 10^{-3}}=2831.93A](https://tex.z-dn.net/?f=i%3D%5Cfrac%7BV%7D%7BR%7D%3D%5Cfrac%7B33.7%7D%7B11.9%5Ctimes%2010%5E%7B-3%7D%7D%3D2831.93A)
(B) Current density is equal to
![J=\frac{i}{A}](https://tex.z-dn.net/?f=J%3D%5Cfrac%7Bi%7D%7BA%7D)
![J=\frac{2831.93}{4.20\times 10^{-5}}=8.40A/m^2](https://tex.z-dn.net/?f=J%3D%5Cfrac%7B2831.93%7D%7B4.20%5Ctimes%2010%5E%7B-5%7D%7D%3D8.40A%2Fm%5E2)
(c) Resistance is equal to
![R=\frac{\rho l}{A}](https://tex.z-dn.net/?f=R%3D%5Cfrac%7B%5Crho%20l%7D%7BA%7D)
![11.9\times 10^{-3}=\frac{\rho \times 3.22}{4.20\times 10^{-5}}](https://tex.z-dn.net/?f=11.9%5Ctimes%2010%5E%7B-3%7D%3D%5Cfrac%7B%5Crho%20%5Ctimes%203.22%7D%7B4.20%5Ctimes%2010%5E%7B-5%7D%7D)
![\rho =15.52\times 10^{-9}ohm-m](https://tex.z-dn.net/?f=%5Crho%20%3D15.52%5Ctimes%2010%5E%7B-9%7Dohm-m)
Answer:It increases confidence because the more times you conduct the same experiment over and over should either prove your hypothesis right and wrong and eliminate any random occurrences that might affect your results.
Read more on Brainly.com - brainly.com/question/1492542#readmore
Explanation:
4. 1 and 2 only.
1. the downward force is the force of gravity.
<span>2. The upward force exerted is the Normal reaction from the floor.</span>