A hollow tennis ball and a solid steel ball of the same diameter are dropped at the same time. Which ball has the greater force acting on it

Why do astronauts in the space shuttle weigh less?

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:

Is a volume of space that is empty of matter.