Aballoon filled with helium gas has a volume of 500 ml at a pressure of 1 atm. the balloon is released and reaches an altitude of 6.5 km, where the pressure is 0.5 atm. if the temperature has remained the same, what volume does the gas occupy at this height?

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 independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of