Stick with your original instinct on this one because unless the exact values are given, it is best to stick with density and forget bulk modulus all together... in terms of the MCAT only of course.According to the formula
Greater density means lower speed.
The only difference between salt water and freshwater is density. Why does sound travel faster in a denser liquid??
it's not that bulk modulus is more important, but that bulk modulus changes MORE than density does.How and when can you tell which has the greater effect on speed of sound? athe bulk modulus or density? I know that within the same phase density has the greater effect i.e. speed of sound is greater in He than O2. But for this example, isn't freshwater and saltwater both in liquid phase, so shouldn't we only consider density? why is bulk modulus more important here?
The formulae for speed of sound in a liquid and in solid rod are essentially the same, except that the liquid equation uses bulk modulus and the solid rod equation uses Young's modulus.it's not that bulk modulus is more important, but that bulk modulus changes MORE than density does.
The ratio of effect should be 1:1. But it's just difficult to know how much bulk modulus changes without given values.
But why do we keep saying "Bulk Modulus?"
The formula has Young's Modulus (which is tensile modulus), not bulk...
Wait, I'm just echoing BR.It wouldn't make much sense that a tensile property would dictate a compressive motion now would it!?