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21Apr
2015
1
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Silver coin quiz

Posted by :ruchiahuja60


 

A silver coin with a diameter of 4 cm (such as the U.S. silver dollar) has a surface area of about 27.7 square cm. If you break this coin up into silver nanoparticles of 1 nm each, what would their combined surface area be?

 

1. 11.4 square meters


2. 140 square meters


3. 1,400 square meters


4. 11,400 square meters

 

If you are genius answer it , in the comment box.

 

Tag(s) : quizzes, Tough Quizes, nanotechnology, nanoparticles, ,    


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