The time it takes for 1g of strontium-90 to decay to 250 mg is; 57.6 years
<h3>What is the half life of an element?</h3>
The formula for half life is;
A(t) = A₀ * (¹/₂)^(t/t_1/2)
Where;
A(t) is amount left after t years
A₀ the initial quantity of the substance that will undergo decay;
t_1/2 is the half-life of the decaying quantity.
We are given;
t_1/2 = 28.8 years
A₀ = 1 g
A(t) = 250 mg = 0.25 g
Thus;
0.25 = 1 * (¹/₂)^(t/28.8)
log 0.25 = (t/28.8) log (1/2)
-0.60206 = (t/28.8) * -0.3010
t = 2 * 28.8
t = 57.6 years
Read more about half life at; brainly.com/question/11152793
The process that releases carbon dioxide into the atmosphere is called cellular respiration. In this process, carbon dioxide is emitted or produced along with other metabolites such as lactic acid, aldehydes, acetic acids, and other kinds.
Explanation:
Respiration and decay return carbon to the atmosphere. Fossil fuels (oil, coal, and natural gas) are fashioned from buried remains of organisms. The burning of fossil fuels conjointly releases carbon into the atmosphere.cellular respiration could be a set of metabolic reactions and processes that crop up within the cells of organisms to convert organic chemistry energy from nutrients into ATP(ATP), and so unleash waste merchandise.
Answer:here
Explanation: When consuming a food for the first time, the level of dopamine transmission in the brain is increased and causes a feeling of enjoyment. When exposed to the food more often, the dopamine response transfers onto cues that are associated with food reward, for example the sight or smell of the particular food.
There are no choices. however, an example of a person with integrity could be doing the right thing when no one is watching and staying true to yourself.
