chantelljenkins2
07.01.2022 •
Biology
PLZ HELP A scientist is testing the effects of exercise on students' heart rates. She asks a student to run in place for 1 minute and another student to stand still for one minute. She then measures and records their heart rate in beats per minute ONLY ONCE. The scientist decided one trial was enough for her study. Is this a well-designed experiment and why?
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Ответ:
Tobacco Smoke
and
Combustion from Industry.~ Almost all of the common air pollutants can be produced by industrial processes.
hope i helped :]