All of the factors that can change in an experiment are called variables. Which of the following is true about the variables in an experiment?
A.
One variable should change and the others should be kept the same.
B.
All variables should be kept the same.
C.
One variable should be kept the same and at least two variables should change.
D.
All variables should change.

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

In salt water solution,the salt is the blank

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