1. Which source of thermal energy is responsible for melting the sea ice? A The wind heats the sea ice through mechanical energy transfer. B. The sun heats the sea ice through radiation energy transfer. C. The sea salt heats the ice through electrical energy transfer. D. The ocean heats the sea ice through chemical energy transfer.​

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.