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a radio active substance has half life of 5 days initial mass of 12kg.how much the original isotope will remain after 10 days?
the halflife is 10 days
Forty days and forty nights - it's one of his world famous FRAME GAMES . . .
Because some days, the sun does not shine. And none of the nights.
Let's step through the half-life of radon to see how it works. Radon-222 starts at full strength. In four days (its half-life), it is at half strength. In four more days, it is again at half strength (of the half strength) for a total of 1/4 strength. In four more days, it is again half the strength (of the 1/4 strength) for a total of 1/8 strength. In four more days, it is another half life weaker, for a total of 1/16 strength. In 16 days, this isotope of radon has just 1/16th the original radiation.
barbara eden
Days and Nights of the Great Flood Days and Nights of the Great Flood
The Days of Our Nights was created on 1999-10-26.
maybe there is gonna be three nights with four days like they will sleep at three nights and when is four days they wont sleep the four days
Days get shorter and nights get longer until the winter solstice, at which point the days become longer and the nights become shorter.
40 Days and 40 Nights
40 days and 40 nights.
Late Nights Early Days was created in 1980.
Days and Nights - 2014 was released on: USA: 2014
cold for short days and longer nights
The duration of Six Days Seven Nights is 1.63 hours.
The duration of Seven Days... Seven Nights is 1.58 hours.