The Earth's gravitational pull and the table's force are of equal magnitude and in opposite directions, they balance each other.
<u>Explanation:</u>
A book placed on a surface have two forces acting on it which are, a force that pulls it toward the ground in a downward direction, that is gravitational pull and a second which is acted on the book on upward direction making a balance on the object.
This follows Newton’s third law of motion that states every action has an equal and opposite reaction. ![\bold{\mathrm{F}_{\mathrm{A}}=-\mathrm{F}_{\mathrm{B}}}](https://tex.z-dn.net/?f=%5Cbold%7B%5Cmathrm%7BF%7D_%7B%5Cmathrm%7BA%7D%7D%3D-%5Cmathrm%7BF%7D_%7B%5Cmathrm%7BB%7D%7D%7D)
Answer:
The potential energy is ![PE = 2.031 *10^{-7} \ J](https://tex.z-dn.net/?f=PE%20%20%3D%202.031%20%2A10%5E%7B-7%7D%20%5C%20%20J)
Explanation:
From the question we are told that
The inner radius is ![r_i = 5 \ mm = 0.005 \ m](https://tex.z-dn.net/?f=r_i%20%3D%20%205%20%5C%20mm%20%3D%20%200.005%20%5C%20m)
The outer radius is ![r_o = 11 \ mm = 0.011 \ m](https://tex.z-dn.net/?f=r_o%20%20%20%3D%20%2011%20%5C%20mm%20%3D%200.011%20%5C%20m)
The common length is ![l = 160 \ m](https://tex.z-dn.net/?f=l%20%20%3D%20160%20%5C%20m)
The potential difference is ![V = 6 \ V](https://tex.z-dn.net/?f=V%20%20%3D%20%206%20%5C%20%20V)
Generally the capacitance of the cylindrical capacitor is mathematically represented as
![C = \frac{2 \pi * k * \epsilon_o }{ ln \frac{ r_o }{r_i} } * l](https://tex.z-dn.net/?f=C%20%3D%20%5Cfrac%7B2%20%5Cpi%20%20%2A%20%20k%20%20%2A%20%20%5Cepsilon_o%20%7D%7B%20ln%20%5Cfrac%7B%20r_o%20%7D%7Br_i%7D%20%7D%20%20%2A%20%20l)
Where
is the permitivity of free space with the values ![\epsilon _o = 8.85*10^{-12} \ m^{-3} \cdot kg^{-1}\cdot s^4 \cdot A^2](https://tex.z-dn.net/?f=%5Cepsilon%20_o%20%20%3D%20%208.85%2A10%5E%7B-12%7D%20%5C%20%20m%5E%7B-3%7D%20%5Ccdot%20kg%5E%7B-1%7D%5Ccdot%20%20s%5E4%20%5Ccdot%20A%5E2)
and k is the dielectric constant of the dielectric material here the dielectric material is free space so k = 1
Substituting values
![C = \frac{2* 3.142 * 1 * 8.85*10^{-12} }{ ln \frac{ 0.011}{0.005} } * 160](https://tex.z-dn.net/?f=C%20%3D%20%5Cfrac%7B2%2A%20%203.142%20%20%20%2A%20%201%20%20%2A%20%208.85%2A10%5E%7B-12%7D%20%7D%7B%20ln%20%5Cfrac%7B%200.011%7D%7B0.005%7D%20%7D%20%20%2A%20%20160)
![C = 1.129 *10^{-8} \ F](https://tex.z-dn.net/?f=C%20%3D%201.129%20%2A10%5E%7B-8%7D%20%5C%20F)
The potential energy stored is mathematically represented as
![PE = \frac{1}{2} * C * V ^2](https://tex.z-dn.net/?f=PE%20%20%3D%20%20%5Cfrac%7B1%7D%7B2%7D%20%2A%20%20C%20%20%2A%20V%20%5E2)
substituting values
![PE = 0.5 * 1.129 *10^{-8} * (6)^2](https://tex.z-dn.net/?f=PE%20%20%3D%200.5%20%20%20%2A%20%20%201.129%20%2A10%5E%7B-8%7D%20%20%2A%20%286%29%5E2)
![PE = 2.031 *10^{-7} \ J](https://tex.z-dn.net/?f=PE%20%20%3D%202.031%20%2A10%5E%7B-7%7D%20%5C%20%20J)
Answer: The maximum kinetic energy KEe of ejected electrons (photoelectrons) is given by KEe = hf − BE, where hf is the photon energy and BE is the binding energy (or work function) of the electron to the particular material.
Explanation:
When we see glass, we don't see the glass object itself but through other objects in the room are reflected/distorted by the glass. The glass disappeared because both Pyrex and vegetable oil bend (refract) light by the same amount – light travels straight through both materials!