5.25 calories are absorbed by an iron nail. How many joules is this? a) 1.07
b) 9.43
c) 12.6
d) 21.9
* I NEED EXPLANATION!!! *

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.

Find the mass, in grams, of 5.00*10^23 molecules of f2

The graph shows one consequence of urban sprawl. how did urban sprawl contribute to the change in biodiversity