What is the most significant breakthrough in forensic science since the development of fingerprinting?

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

Which material burns faster? metal aluminum

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