Answer:
200 C
Explanation:
Let C1 and C2 be their charges. According to Coulomb's law

where k =
is the constant, R = 0.4m is the distance between them, F = 120 N is their resulting charge force


Since their total charge is 200C:
or 
We can substitute the above equation


or
So the larger charge is C = 200 C
The answer is A) accumulation zone
1) v = gt = 10*1.5 = 15 m/s
2) r = gt^2 /2 = 10*(1.5)^2 / 2 = 11.25 meters
It is dangerous to stand close to railroad tracks when a rapidly moving commuter train passes. Explain why atmospheric pressure would push you toward the moving train. Water pressure inside a hose nozzle can be less than atmospheric pressure due to the Bernoulli effect.
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