Aresearcher wants to determine if lead levels are different between the top of a glass of water and the bottom of a glass of water. many samples of water are taken. from half, the lead level at the top is measured and from half, the lead level at the bottom is measured. would this be a valid matched pair test?
no, as the lead levels cannot be accurately measured
no, as the measurements of top and bottom should be from the same glass
yes, as long as there are an equal number of glasses in each group
yes, as long as they are all from the same faucet

Bose-einstein condensation occurs at what temperature?

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

What happens when the temperature of a solution increases?