Question

A certain radioactive element has half-life of 4 days. The fraction of material that decays in two days is,

• A. 1/2
• B. 1/$\sqrt{2}$
• C. $\sqrt{2}$
• D. $\left( \sqrt{2} - 1 \right)/\sqrt{2}$

Answer 1

Answer: (D)

$\left( \sqrt{2} - 1 \right)/\sqrt{2}$

Answer 2

N =