Which pair of elements if most apt to form an ionic compound with each other? (a) calcium, sodium(b) oxygen, fluroine(c) barium, bromine(d) sulfur fluorine

Why are people not able to skip a dive to the deepest part of the ocean

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.

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.