Which of the following is not one of the three forms of solid carbon?

amorphous
graphite
wood
diamond

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

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.

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?