There are 52 weeks in a year, and therefore 26 weeks in a half year.52 + 52 + 26 = 130 weeks in two and a half years.i googled how many weeks are in 2 years and it gave me 104.354914. and i divided it in half and added it to 104.354914. and i got 156.532371
25%
39
The average male growth spurt lasts for two years, and the average female growth spurt for two to two and a half years. These are only averages, and individuals may experience different lengths of maximum growth.
30 eggs are in two and a half dozens.
two years or twevle years
After 2 half-lives (two half-lives of tritium is 12.32 x 2 = 24.64 years), the initial 10g sample of tritium would have decayed by half to 5g.
It would take 4.5 billion years for a sample of U-235 to undergo 2 half-lives. U-235 has a half-life of about 700 million years, so two half-lives would be 1.4 billion years, which is equivalent to 4.5 billion years.
130
Since the element has a half-life of 1000 years, it will take two half-lives for the mass to decrease to 5 grams from 20 grams. Two half-lives equal 2000 years, so you would have to wait 2000 years for the mass to decrease to 5 grams.
After two half-lives, 75% of the original material has decayed.
3 At the end of the first half life, there will theoretically be 50% remaining. 2 half lives: 25% 3 half lives:12.5 %
After two half lives, 25% of the original carbon-14 would remain. This is because half of the remaining carbon-14 decays during each half life, leaving you with 50% after one half life and 25% after two half lives.
The fossil would be approximately 600 years old. We can calculate this by determining how many half-lives have passed based on the remaining 25% of the original radioactive material. Since the half-life is 200 years, and with 25% remaining, it means two half-lives have passed (50% after first, 25% after second). Therefore, 2 x 200 = 400 years.
It would take approximately 40 years for the isotope to decay to about one-sixteenth of its original amount. This is because each half-life reduces the amount by half, so after two half-lives (20 years) the amount would be reduced to one-quarter, and after three half-lives (30 years) it would be reduced to one-eighth, approaching one-sixteenth after four half-lives (40 years).
From mid-2011, about two and a half.
There are 52 weeks in a year, and therefore 26 weeks in a half year.52 + 52 + 26 = 130 weeks in two and a half years.i googled how many weeks are in 2 years and it gave me 104.354914. and i divided it in half and added it to 104.354914. and i got 156.532371