Answer:
![C=\epsilon_{o}\frac{\pi R^_{2}}{d}](https://tex.z-dn.net/?f=C%3D%5Cepsilon_%7Bo%7D%5Cfrac%7B%5Cpi%20R%5E_%7B2%7D%7D%7Bd%7D)
This result is a very good approximation, because R>>d
Explanation:
The capacitance for two parallel flat plates, with surface S, space between them d, is:
![C=\epsilon_{o}\frac{S}{d} =\epsilon_{o}\frac{\pi R^_{2}}{d}](https://tex.z-dn.net/?f=C%3D%5Cepsilon_%7Bo%7D%5Cfrac%7BS%7D%7Bd%7D%20%3D%5Cepsilon_%7Bo%7D%5Cfrac%7B%5Cpi%20R%5E_%7B2%7D%7D%7Bd%7D)
This calculation is based on the fact that the electric field is constant between the plates. This only happens if the area of the plates is much larger than the distance between them: S>>d, i.e. R>>d. If we assume these factors, the result has a very good approximation.
Potential energy can be calculated using the following rule:
potential energy = mgh where:
m is the mass = 85 kg
g is the acceleration due to gravity = 9.8 m/sec^2
h is the height = 4 km = 4000 meters
Substitute in the above equation to get the potential energy as follows:
Potential energy = 85*9.8*4000 = 3332000 joules
Answer:
The first questions answer is letter A
Answer:
where the rocks are exposed to really hot conditions and high pressure....these conditions are found deep where tectonic plates meet or deep inisde the earth past our core
hope this helps !!!!!