The answer is B tell me if I am wrong.
Answer:
High Potential Difference
Explanation:
Lightning is a type of Electrical Discharge and for any electrical discharge to happen we require a high potential difference between two areas in space.
In case of lightning this potential difference can be formed between 2 clouds, between a cloud and the ground or two different areas in the same cloud.
So during lightning this potential difference causes different type of lightning due to electrification followed by charge separation and hence aggregation of charge is specific areas of clouds.
Answer:
height of the water rise in tank is 10ft
Explanation:
Apply the bernoulli's equation between the reservoir surface (1) and siphon exit (2)

-------(1)
substitute 
0ft/s for V₁, 20ft for (z₁ - z₂) and 32.2ft/s² for g in eqn (1)


Applying bernoulli's equation between tank surface (3) and orifice exit (4)

substitute

0ft/s for V₃, h for z₃, 0ft for z₄, 32,2ft/s² for g

At equillibrium Fow rate at point 2 is equal to flow rate at point 4
Q₂ = Q₄
A₂V₂ = A₃V₃
The diameter of the orifice and the siphon are equal , hence there area should be the same
substitute A₂ for A₃
for V₂
for V₄
A₂V₂ = A₃V₃

Therefore ,height of the water rise in tank is 10ft
We need to find pressure when h = 85 ft
We know the formula for pressure P = hρg, where h is the height of liquid, ρ is the density of liquid and g is the acceleration due to gravity value.
We have ρ = (0.001h+1.60)slug/
= 515.24 kg/
h = 25.908 m
g = 9.8m/
So pressure, P = 25.908*515.24*9.8 = 13088.61 N/
= 18.97 psi