Physics, 28.07.2019 02:30 Nathaliasmiles
As an emergency vehicle approaches bob and moves away from jill, how does the actual frequency of the siren change? a) as an emergency vehicle approaches bob the frequency increases. b) as an emergency vehicle moves away from jill the frequency decreases. c) the actual frequency of the siren does not change despite appearances. d) bob does not notice any change until the vehicle passes him and the siren increases.
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Ethanol has a heat of vaporization of 38.56 kj/mol and a normal boiling point of 78.4 c. what is the vapor pressure of ethanol at 14 c?
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As an emergency vehicle approaches bob and moves away from jill, how does the actual frequency of th...
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