The rows in the periodic table are called periods. Which characteristic of the elements increases as you move across a period from left to right? O A. Magnetic attraction B. Metallic nature O C. Atomic number O D. Year discovered

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.