A subatomic particle is emitted, and moves 15.5 mm in the positive y-direction. It then moves 19.0 mm in the negative y-direction, then 7.0 mm in the positive y direction. What is the final displacement of this subatomic particle? a. 3.5mm b. 41.5 mm c. -3.5mm d. -41.5 mm

Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.

Asystematic approach to problem solving is called a (an)

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •