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How does a vending machines verify a dollar bill vs. counterfeit?
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If I put a speaker or phone in an enclosed cone, will it make the sound waves shrink and muffle the sound?
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Why does my phone mysteriously charge?
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If we could take a "picture" with our eyes and zoom in, could we see detail like the 45 megapixel image of Dubai?
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How does a vending machines verify a dollar bill vs. counterfeit?
899
--
10
9
8
7
6
5
4
3
2
1
0
If I put a speaker or phone in an enclosed cone, will it make the sound waves shrink and muffle the sound?
1
--
10
9
8
7
6
5
4
3
2
1
0
Why does my phone mysteriously charge?
1
--
10
9
8
7
6
5
4
3
2
1
0
If we could take a "picture" with our eyes and zoom in, could we see detail like the 45 megapixel image of Dubai?
1
--
10
9
8
7
6
5
4
3
2
1
0
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