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The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

Express the following number in scientific notation. 0.026890 =

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6