Is it possible for there to be cool updrafts or warm downdrafts in the atmosphere? i've only heard of the case where warm air rises (updraft) and cool air sinks (downdraft).

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.

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?