A radioactive isotope has a half-life of days, and a sample of this isotope has a mass of mg initially. When will there be only 8mg remaining? (Round your answer to the nearest day.)

11 days.

Explanation:

According to the statement, the radioactive isotope has a half-life greater than 1 day and lesser than 7 days. Let assume that the radioactive isotope has a half-life of 4 days and the initial mass is 50 mg. The time constant is:

The time when mass is reduced to 8 milligrams is:

It is approximately 11 days.

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more