An electron in the Thomson model of hydrogen: emits photon, is embedded in a positive cloud, revolves around the nucleus, none of the above

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

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:

Which would increase mechanical advantage?