If you add up to parallel resistors do you keep the same voltage

What happens when you slowly pulled the carboard?

Asynthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard deviation 3.5 psi. how is the standard deviation of the sample mean changed when the sample size is increased from n equals 8 to n equals 47

Which describes increasing the efficiency of energy resource