Q
QuestionPhysics

"One group notices that uncooked sausages sink to the bottom of the pot, and that when boiled, the cooked sausages float. The group suggests that floating or sinking can be used to test if a sausage is cooked. So they turn off the heat and write up the report. Much later, you notice that the cooked sausages have sunk to the bottom of the pot again. Briefly suggest why the sausages sink or float."
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Answer

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Step 1
: Understand the concept of density

When determining whether an object will float or sink, density plays a crucial role. Density is defined as the mass of an object per unit volume. If the density of an object is greater than the fluid it is in, the object will sink. Conversely, if the density of the object is less than the fluid, the object will float.

Step 2
: Examine the sausages' states and densities

In this scenario, we have two states of sausages: uncooked and cooked. When the sausages are uncooked, they sink to the bottom of the pot. This indicates that the density of uncooked sausages is greater than the density of the fluid (water) in the pot. When the sausages are cooked, they float. This implies that the density of cooked sausages is now less than the density of the water in the pot.

Final Answer

Sausages sink or float based on their density relative to the fluid they are in. The density of sausages changes during cooking due to variations in volume. When sausages are cooked, they absorb water and expand, decreasing their density and causing them to float. However, if the cooked sausages release water and shrink in volume as they cool down, their density may increase, making them sink again.

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