What evidence supports the law of conversation of Energy As 1( light energy is converted to chemical energy during photosynthesis) 2(oxygen is made from the breakdown of carbon dioxide during photosynthesis) (3 Energy is absorbed by Chlorophyll during photosynthesis) (4 The sun gives off light energy that is absorbed by plants)

The state or quality of being humid.a quantity representing the amount of water vapor in the atmosphere or a gas.

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.