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Describe two examples of how humans use electromagnetic waves.
asked
Jun 16, 2017
Physics
high-school
2
answers
3
votes
77.3k
views
What is the molality of solid solder wire if it is made from 68.7 g of lead dissolved in 117 g of tin?
asked
Dec 21, 2016
Chemistry
middle-school
1
answer
4
votes
95.7k
views
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