A neutrally charged plastic ruler is rubbed with cotton and acquires a positive charge what statements that are true for positively charge strip a) it loses so electrons In the cloth during the charging process
b) it loses all of its electrons to the cotton during the charging process
c) it has the opposite charge to cotton
d) it would now be repelled by the plece of cotton which was used to charge it
e) it gained protons during rubbing process
f) it could exert either a repulsive or attractive influence upon naturally charged paper bits
g) it has an excess of protons compared to the number of electrons

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.