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Free_Kalibri [48]
2 years ago
6

After two half-;ives (9 billion years) what percent of the orignal uranium remains?

Biology
1 answer:
Colt1911 [192]2 years ago
3 0

The percentage of the orignal uranium that remains after two half-lives is 25%

<h3>Data obtained from the question </h3>
  • Original amount (N₀) = 100%
  • Number of half lives (n) = 2
  • Percentage remainig (N) =?

<h3>How to determine the percentage remaining</h3>

N = N₀ / 2ⁿ

N = 100 / 2²

N = 100 / 4

N = 25%

Thus 25% of the original sample remains

Learn more about half life:

brainly.com/question/26374513

#SPJ1

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Increasing the alveolar ventilation rate will increase the partial pressure of oxygen in the alveoli.

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A high rate of alveolar ventilation, would result in a rapid influx of oxygen-rich air and efflux carbon dioxide-filled air from the alveoli.  This ultimately results in an increase in the concentration of oxygen and a decrease in the concentration of carbon dioxide within the alveoli.

Effects of alveolar ventilation on partial pressures of alveolar carbon dioxide and oxygen (PACO₂ and PAO₂)

If the  alveolar ventilation rate is increased (and carbon dioxide production is unchanged), then the partial pressure of carbon dioxide in the alveoli, PACO₂ will decrease.

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