Answer:
+ 14
Explanation:
18 protons make a positive 18 charge (+18)
4 electrons make a negative 4 charge (-4)
both combined give + 18 - 4 = + 14
The four neutrons don't carry net charge, so the addition of the electrons doesn' affect the net charge found above which still gives + 14.
Answer:
Electric field due to two charges is given as
![E = 1.44 \times 10^7 N/C](https://tex.z-dn.net/?f=E%20%3D%201.44%20%5Ctimes%2010%5E7%20N%2FC)
Explanation:
As we know that two charges are opposite in nature
So the electric field at the mid point of two charges will add together
so the net field is given as
![E = 2\frac{kq}{r^2}](https://tex.z-dn.net/?f=E%20%3D%202%5Cfrac%7Bkq%7D%7Br%5E2%7D)
now we have
![q = 2\times 10^{-6} C](https://tex.z-dn.net/?f=q%20%3D%202%5Ctimes%2010%5E%7B-6%7D%20C)
![r = 5 cm = 0.05 m](https://tex.z-dn.net/?f=r%20%3D%205%20cm%20%3D%200.05%20m)
now we have
![E = 2\frac{(9\times 10^9)(2\times 10^{-6})}{0.05^2}](https://tex.z-dn.net/?f=E%20%3D%202%5Cfrac%7B%289%5Ctimes%2010%5E9%29%282%5Ctimes%2010%5E%7B-6%7D%29%7D%7B0.05%5E2%7D)
![E = 1.44 \times 10^7 N/C](https://tex.z-dn.net/?f=E%20%3D%201.44%20%5Ctimes%2010%5E7%20N%2FC)
<u>Answer</u>:
When light passes through an object unchanged, scientists call that process Transmission.
<u>Explanation</u>:
Transmission is the process where all the light that is passed through the material moves via the material without being absorbed. The Transmission depends on the affected radiation.The Transmittance of the medium is defined as the ratio between transmitted radiant power and incident radiant power. The light that is passed through the medium and not reflected will be either scattered or reflected. The light can be transmitted only through transparent or translucent material. Opaque object does not allows transmission of light.