A child on a high dive has a mass of 40 kilograms. If the high dive is 10 meters in the air, what is the potential energy? 3920 Joules

400 Joules

4 Joules

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.

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?

What is the formula of the ionic compound composed of calcium cations and chloride anions