If the half-life is 5 minutes, then 30 minutes is equivalent to 6 half-lives. So, after six successive half-lives, the 400 mg of the radioisotope would have a mass of 400(0.5)⁶ = 6.25 mg.
Thus, A would be the correct answer choice here.
I think it will be 'heat' because it doesn't change - only your material changes.
Answer:
thank you for your advice
Answer:
A. The withdrawal of Great Britain from the North Atlantic Treaty Organization (NATO)
Explanation:
Thatcherism is a form of named after Conservative Party leader Margaret Thatcher. The term has been used to describe the principles of the British government under Thatcher from the 1979 general election to her resignation in 1990, and continuing into the Conservative governments under John Major and David Cameron.
