Why is it that the receding (contact angle during decrease in volume of droplet) dynamic sessile drop method cannot be used to calculate surface energies, but the advancing (contact angle during increase in volume of droplet) method could?

Ateacher gives students four liquids commonly found in the kitchen - vinegar, apple juice, dish detergent, and milk - and ph indicator strips, which measure acidity. the teacher asks the students to put the liquids in order from most acidic to most basic. what type of investigation could the students conduct to determine the correct order for the liquids?

Madison lives near the ocean. she’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. if madison plans to test this hypothesis, she will have to deal with the following variables in her experiment: dependent variable: independent variable: one possible confounding variable:

For most stars, what does a higher temperature tend to to with? a lower luminosity a higher luminositya red color none of the above