A hazardous material was found to decay at a rate proportional to the amount present. Initially, there were 50 mg of this radioactive material that was present. After two hours, it has lost 10% of its original amount. Find the mass of the material after four hours. A) 5mg B) 40.5mg C) 45mg D) 4.5mg

A hazardous material was found to decay at a rate proportional to the amount present. Initially, there were 50 mg of this radioactive material that was present. After two hours, it has lost 10% of its original amount. Find the mass of the material after four hours. A) 5mg B) 40.5mg C) 45mg D) 4.5mg

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter4: Temperature Effects On Atom Arrangements And Atom Motion

Section: Chapter Questions

Problem 4.14P

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Question

A hazardous material was found to decay at a rate proportional to
the amount present. Initially, there were 50 mg of this radioactive
material that was present. After two hours, it has lost 10% of its
original amount. Find the mass of the material after four hours.
A) 5mg
B) 40.5mg
C) 45mg
D) 4.5mg

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