Astrong lightning bolt transfers about 24c to earth. how many electrons are transferred? the elementary charge is 1.60218x10^-19 c

Here T is the tension and μ the mass per unit length of the string. 
Therefore, to double the wave speed on the string, the tension has to increase by a factor of 4. 

In your notation: F2/F1 = 4

Nps pollution is caused by rainfall or snowmelt moving over and through the ground. nonpoint source pollution can include: excess fertilizers, herbicides and insecticides from agricultural lands and residential areas. oil, grease and toxic chemicals from urban runoff and energy production