the life of plutonium-239 is 24,300 years. if a nuclear bomb released 8kg of this isotope, how many years would pass before the amount is reduced to 1 kg.

97200yrs,

Explanation:

Given parameters:

Half-life of Plutonium - 239  = 24300yrs

Mass of the isotope  = 8kg

Unknown:

Number of years it will take for the amount to reduce to 1kg = ?

Solution:

The half -life of any substance is the time taken for half of the compound to decay to half its original composition.

               Start     first half life     second half life   third half life

mass       8kg              4kg                   2kg                    1kg

Time         0yrs            24300            48600               97200

By 97200yrs, the mass would have been 1kg

when atmosphere interacts with biosphere they focuses on on the sources and sinks of green house gases (ghgs) air pollutants, particular matters, water and energy between the earth's surface and the atmosphere. the biosphere affects the climate. the atmosphere and biosphere are in constant interaction with each other, and all living things rely on gases in the atmosphere for life. organisms such as animals take in oxygen gas form the atmosphere to use in every cell of their body for smooth functioning of daily routine exercises.

it should be p1 v1 = p2 v2