Sagot :
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Compare the speed of sound in the following pairs of materials. Write the symbols < or > on the space between the two material.
1. steel > seawater
2. carbon > dioxide iron
3. wood < air
4. oxygen > glass
5. brass > mercury
[tex] = = = = = = = ======== = = = = = = = = = = = = = = = [/tex]
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