What is tje role of a predator in a food web ? pls me

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?

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