Answer:
![6.6*10^{27}e/m^3](https://tex.z-dn.net/?f=6.6%2A10%5E%7B27%7De%2Fm%5E3)
Explanation:
When we are dealing with Hall voltage, it is necessary to have the values of the current, the magnetic field, the length, the area and the number of carriers at hand. The Hall voltage equation is given by,![V_h = \frac{iB}{neL}](https://tex.z-dn.net/?f=V_h%20%3D%20%5Cfrac%7BiB%7D%7BneL%7D)
Where,
i= current
B= Magnetic field
L = Length
n = number of charge carriers
e= charge of a electron
We need replace and solve for n,
![n= \frac{iB}{V_h e L}](https://tex.z-dn.net/?f=n%3D%20%5Cfrac%7BiB%7D%7BV_h%20e%20L%7D)
![n= \frac{2*1.2}{4.5*10^{-6}*5^10^{-3}*1.6*10^{-19}}](https://tex.z-dn.net/?f=n%3D%20%5Cfrac%7B2%2A1.2%7D%7B4.5%2A10%5E%7B-6%7D%2A5%5E10%5E%7B-3%7D%2A1.6%2A10%5E%7B-19%7D%7D)
![n= 6.6*10^{27}electron.m^{-3}](https://tex.z-dn.net/?f=n%3D%206.6%2A10%5E%7B27%7Delectron.m%5E%7B-3%7D)
Therefore the density of charge carrier is ![6.6*10^{27}e/m^3](https://tex.z-dn.net/?f=6.6%2A10%5E%7B27%7De%2Fm%5E3)
A body of mass 2kg is at rest. A force of 20N makes it move with a velocity of 5m/s, the impulse of the body would be 10 Kgm/s
<h3>What is impulse?</h3>
The product of the average applied force and the time for which it is exerted is known as an impulse. The unit for the impulse of force is the same as that of momentum which is kg*m/s
The mathematical relation for impulse is
Impulse = F * Δt =change in momentum
As given in the problem body of mass of 2 kg is at rest. A force of 20N makes it move with a velocity of 5m/s
Change in the momentum of the body
Δm = m(v₂-v₁)
As the body was initially at rest v₁ =0
Δm = 2×5
Δm = 10 Kgm/s
As we know that change in the momentum represents the impulse of the force
Thus, the impulse of the body would be 10 Kgm/s
Learn more about impulse, here
brainly.com/question/16980676
#SPJ1
Gas giants lol I'm love this kinda stuff nothing else just this question
This phenomenon is as a result of static friction created by the tumbling clothes. Static friction results from the rubbing together of two or mores objects or body and electrons are stripped from one surface of the clothes more than the other. This creates an electrostatic force of attractions between the positive charges on one cloth and the negative charges on the other cloth.(unlike charges attract).