An uncooked egg sinks in fresh water but floats in salt water. Which of the following expressions about the egg's density with respect to the density of fresh water and the density of salt water is correct?Group of answer choicesdensity of egg < density of fresh water < density of salt waterdensity of fresh water < density of egg < density of salt waterdensity of salt water < density of egg < density of fresh waterdensity of fresh water < density of salt water <density of egg
Question
An uncooked egg sinks in fresh water but floats in salt water. Which of the following expressions about the egg's density with respect to the density of fresh water and the density of salt water is correct?Group of answer choicesdensity of egg < density of fresh water < density of salt waterdensity of fresh water < density of egg < density of salt waterdensity of salt water < density of egg < density of fresh waterdensity of fresh water < density of salt water <density of egg
Solution
The correct expression would be "density of egg < density of fresh water < density of salt water".
Here's why:
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An object will float in a fluid if its density is less than the density of the fluid. Conversely, an object will sink in a fluid if its density is greater than the density of the fluid.
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The egg sinks in fresh water, which means the egg's density is greater than the density of fresh water.
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The egg floats in salt water, which means the egg's density is less than the density of salt water.
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Salt water is denser than fresh water because the dissolved salt increases the mass of the water without significantly increasing its volume.
Therefore, the correct relationship between the densities of the egg, fresh water, and salt water is "density of egg < density of fresh water < density of salt water".
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