Select the correct answer. If a scoring attempt was not successful, the official makes the no goal signal by doing what?
A.
Laying one arm over the other in front of his chest
B. Crossing his wrists over his head
C.
Raising one arm in the air
D.
Putting both thumbs up

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 dependent variable in galileo's experiment?