After reading about gravity, Paolo tests his hypothesis that a feather and a marble will fall at the same rate. If the marble falls faster, what should Paolo do next?
A. Decide that the hypothesis is useless because it made an
incorrect prediction
B. Report that the results of the experiment were wrong
C. Conclude that his science textbook was mistaken about gravity
D. Look for other factors that affect how fast something falls

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

The air that we breath is made mostly of which gaseous molecule

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?