Plutonium isotopes undergo decay, producing heat. Plutonium isotope 239 (Pu-239) has 1.91.9 watts per kilogram [W/kg] of decay heat. How much heat, in units of calories [cal], will 1.751.75 moles [mol] of Pu-239 release after decaying for twotwo hours [h]? Assume plutonium has a molecular weight of 244244 grams per mole [g/mol].

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.