First Order Reaction Last Time I Remember
Answer:
The half-life of Plutonium 239 (Pu 239) is 24,100 years.
Explanation:
Half-life is the time required for a quantity to reduce to half of its initial value. This means that in 241000 years, 100g of Pu 239 would be reduced to 50g.
<span>The starting material must be CO2 that can be fixed or turned into other molecules. </span>
<span>The answer is Potassium-40</span>
Answer:
hot air rises because gases expand as they heat up.When air heats up and expands,its density also increases.The warmer,less dense air effectively floats on top of the colder, dense air below it. This creates a buoyant force that causes warmer air to rise.
cold air sinks because it is heavier as its more dense ( because of closely packed molecules) soits harder for them to move and they absorb less energy. Also, gravity pulls on it more strongly.
Hope it helps :)