What can be done to educate students on the dangerous of concussions?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the dependent variable in galileo's experiment?

About how many individuals in the us go bankrupt each year due to medical bills?

Explain why hiv is a life-threatening sti.