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Home Q & A Board Science-Related Homework Help Physics
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killak killak
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5 years ago
The efficiency of classroom-demonstration lasers is typically
A) about one percent.
B) about ten percent.
C) about twenty percent.
D) more than twenty percent.
Textbook 
Conceptual Physics

Conceptual Physics


Edition: 12th
Author:
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Education is the most powerful weapon which you can use to change the world.
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CarinaspCarinasp
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5 years ago
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killak Author
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5 years ago
Smart ... Thanks!
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Hellish Lover
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