Experiment: observing plant pipelines materials: directions: drinking glass put a few drops of food coloring in a glass of water water trim off the bottom 2 cm of a stalk of celery, place food coloring the celery in the water. let stand for 3-4 hours. eye dropper knife stalk of celery results: 1. describe what you see.
11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg