Joe and Maria tested how the lack of light affected the growth of a plant. Joe and Maria left pot 1 in a sunny place. They put pot 2 under a cardboard box. In all other ways (such as the temperature and the amount of water and fertilizer given), Joe and Maria treated both plants the same. If Joe and Maria wanted to know how the lack of light affects plants, which is the best explanation for why they left pot 1 in the sun? subject science please answer now

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?