Answer:
Electronegativity
Explanation:
Element: <em>An element is a substance which can not be split into simpler units by an ordinary chemical process</em>
Electronegativity: This is the power of an atom in a molecule to attract electrons. The electronegativity of an element increase across the period in the periodic table and decreases down the group. The most electronegative elements are the reactive non metals.
Examples of electronnegative element include, Oxygen, Chlorine, Fluorine, Nitrogen, sulphur etc.
Similarity : inverse square law for strength of force compared with distance.
Answer:
The amount of charge that flow through a point is ![\Delta q = 0.126 \ C](https://tex.z-dn.net/?f=%5CDelta%20q%20%20%3D%20%200.126%20%5C%20C)
Explanation:
From the question we are told that
The number of turns is
The area is ![A = 5.87 *10^{-3} m^2](https://tex.z-dn.net/?f=A%20%3D%205.87%20%2A10%5E%7B-3%7D%20m%5E2)
The total resistance is ![R = 14.9 \ \Omega](https://tex.z-dn.net/?f=R%20%3D%2014.9%20%5C%20%5COmega)
The magnetic field in first direction is ![B_1 = 1.93 \ T](https://tex.z-dn.net/?f=B_1%20%3D%20%201.93%20%5C%20T)
The magnetic field in second direction is ![B_2 = -1.93 \ T](https://tex.z-dn.net/?f=B_2%20%3D%20-1.93%20%5C%20T)
The change in magnetic field is evaluated as
![\Delta B = B_1 - B_2](https://tex.z-dn.net/?f=%5CDelta%20B%20%20%3D%20%20B_1%20-%20B_2)
substituting values
![\Delta B = 1.93 - [- 1.93]](https://tex.z-dn.net/?f=%5CDelta%20B%20%20%3D%20%201.93%20-%20%5B-%201.93%5D)
![\Delta B =3.2 \ T](https://tex.z-dn.net/?f=%5CDelta%20B%20%20%3D3.2%20%5C%20T)
The induced emf due to the change is mathematically evaluated as
![e = NA \frac{\Delta B }{\Delta t }](https://tex.z-dn.net/?f=e%20%3D%20NA%20%5Cfrac%7B%5CDelta%20B%20%7D%7B%5CDelta%20t%20%7D)
This can also be mathematically represented as
![e = IR](https://tex.z-dn.net/?f=e%20%3D%20IR)
Where I can be mathematically represented as
![I = \frac{\Delta q }{\Delta t}](https://tex.z-dn.net/?f=I%20%3D%20%20%5Cfrac%7B%5CDelta%20q%20%7D%7B%5CDelta%20t%7D)
So
![e = \frac{\Delta q}{\Delta t } R](https://tex.z-dn.net/?f=e%20%3D%20%5Cfrac%7B%5CDelta%20q%7D%7B%5CDelta%20t%20%7D%20R)
Now
![\frac{\Delta q}{\Delta t } R = NA \frac{\Delta B }{\Delta t }](https://tex.z-dn.net/?f=%5Cfrac%7B%5CDelta%20q%7D%7B%5CDelta%20t%20%7D%20R%20%20%20%20%3D%20NA%20%5Cfrac%7B%5CDelta%20B%20%7D%7B%5CDelta%20t%20%7D)
=> ![\Delta q = \frac{N A (\Delta B)}{R}](https://tex.z-dn.net/?f=%5CDelta%20q%20%20%3D%20%20%5Cfrac%7BN%20A%20%28%5CDelta%20B%29%7D%7BR%7D)
substituting values
![\Delta q = \frac{100 * 5.87 *10^{-3} (3.2}{14.9}](https://tex.z-dn.net/?f=%5CDelta%20q%20%20%3D%20%20%5Cfrac%7B100%20%2A%20%205.87%20%2A10%5E%7B-3%7D%20%283.2%7D%7B14.9%7D)
![\Delta q = 0.126 \ C](https://tex.z-dn.net/?f=%5CDelta%20q%20%20%3D%20%200.126%20%5C%20C)
Sample a is an acid. Ex. Acid rain
Sample b is very weak acid , almost neutral ex. Milk.
THE ANSWER IS B HOPE I COULD HELP