In addition to Earthquake, hurricane, which of the following could be categorized as a "disaster" risk?

Which of the following best describes the formation of plasma?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

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