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Although the Statue of Liberty is made of copper (originally an orange-brown color), it is green because the copper has interacted with substances in the air to form new substances with different properties.
asked
Aug 8, 2017
Chemistry
high-school
1
answer
0
votes
228k
views
How does one develop meditation skill?
asked
Aug 8, 2017
Health
middle-school
2
answers
2
votes
178k
views
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