Answer:
A
Explanation:
acceleration is defined as the rate of change of velocity with time
Answer:![1.066\times 10^7 m/s](https://tex.z-dn.net/?f=1.066%5Ctimes%2010%5E7%20m%2Fs)
Explanation:
Given
Charge per unit area on each plate(
)=![2.2\times 10^{-7}](https://tex.z-dn.net/?f=2.2%5Ctimes%2010%5E%7B-7%7D)
Plate separation(y)=0.013 m
and velocity is given by
![v^2-u^2=2ay](https://tex.z-dn.net/?f=v%5E2-u%5E2%3D2ay)
where a=acceleration is given by
![a=\frac{F}{m}=\frac{eE}{m}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7BF%7D%7Bm%7D%3D%5Cfrac%7BeE%7D%7Bm%7D)
e=charge on electron
E=electric field
m=mass of electron
![E=\frac{\sigma }{\epsilon _0}](https://tex.z-dn.net/?f=E%3D%5Cfrac%7B%5Csigma%20%7D%7B%5Cepsilon%20_0%7D)
![a=\frac{e\sigma }{m\epsilon _0}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7Be%5Csigma%20%7D%7Bm%5Cepsilon%20_0%7D)
substituting values
![v=sqrt{\frac{2e\sigma y}{m\epsilon _0}}](https://tex.z-dn.net/?f=v%3Dsqrt%7B%5Cfrac%7B2e%5Csigma%20y%7D%7Bm%5Cepsilon%20_0%7D%7D)
![v=\sqrt{\frac{2\times 1.6\times 10^{-19}\times 2.2\times 10^{-7}\times 0.013}{9.1\times 10^{-31}\times 8.85\times 10^{-12}}}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B%5Cfrac%7B2%5Ctimes%201.6%5Ctimes%2010%5E%7B-19%7D%5Ctimes%202.2%5Ctimes%2010%5E%7B-7%7D%5Ctimes%200.013%7D%7B9.1%5Ctimes%2010%5E%7B-31%7D%5Ctimes%208.85%5Ctimes%2010%5E%7B-12%7D%7D%7D)
![v=1.066\times 10^7 m/s](https://tex.z-dn.net/?f=v%3D1.066%5Ctimes%2010%5E7%20m%2Fs)
Electrons carry a negative charge.
The systems are geosphere ,hydrosphere, the atmosphere and the biosphere.