The decay equation is of the form
where
m(t) = the mass remaining after t minutes
m₀ = the initial mass
k = constant
Because the half-life is 3 minutes, therefore
Therefore
-3k = ln(0.5)
k = ln(0.5)/(-3) = 0.231
Because m₀ = 16 mg, the time, t, for the mass to decay to 1.0 mg is given by
Answer: 22 min (nearest integer)
Answer:
more agriculture and space and food
My all-time favorite history subject!!!
B mythology
In 1866, after the Civil War, Federal troops were placed in Western Texas in order to restore order, ensure government loyalty and enforce the freedom slaves had just acquired as a result of the war. The U.S military entered the state because commanders believed this was the best way to protect the rights of the blacks and to support president Abraham Lincoln's decision.
Answer: 1. True
Explanation:
Herbert Hoover defeated Democrat Al Smith. He was a Roman Catholic, suffered politically from anti-Catholic prejudice. Hoover won the 1928 election brilliantly. All the sentence is true.