Nuclear decay occurs according to first-order kinetics. Cobalt-60 decays with a rate constant of 0. 131 years–1. After 5. 00 years, a sample has a mass of 0. 302 g. What was the original mass of the sample?.

After rain, water soaks into the ground and is added to the groundwater. this process is known as a. groundwater pollution. b. groundwater recharge. c. groundwater recycling. d. groundwater filtration.

Carlo is wondering what causes plants to grow at different rates. carlo’s hypothesis is “plants will grow more when the day is longer.” what would be the difference between the test group and the control group in this experiment? type of soil type of plants exposure to sunlight method for measuring the growth

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