The hypothesis states that the fraction of
radioactive nuclei after n half-lives is 0.51
In this expression, the value 0.5 represents
the fraction of nuclei still radioactive after any
half-life cycle.
the fraction of nuclei still radioactive at the
start of the experiment.
the amount of time it takes half of the
radioactive atoms to decay.
the number of half-life cycles.
DONE

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?