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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
Answer: See explanation
Explanation:
The Heckscher-Ohlin model refers to an economic theory which states that countries will export the goods that they can produce efficiently and in large quantities while they'll import those that they are less efficient in producing.
According to the H-O theorem, the pattern of trade that exists between countries as a result of the characteristics that are possessed by the countries. In such case, a capital-abundant country can produce a capital intensive good efficiently and therefore should export the capital intensive good. Likewise, a labor-abundant country can produce labor intensive good efficiently and therefore should export the labor-intensive good.
