Which statement describes nuclear binding energy?
it is the difference between the masses of the protons and neutrons and the mass of the nucleus.
it is the energy that is required to bind protons and neutrons together in a nucleus.
it is the energy that is required to overcome mass defect.
it is the energy that is required to overcome the electromagnetic force. it is the result of converting mass to energy.

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.