McqMate
| Q. |
The density of the liquid when heated |
| A. | decreases |
| B. | increases |
| C. | does not change |
| D. | may increase of decrease depending on pressure |
| Answer» A. decreases | |
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Explanation: The mass density of a material varies with temperature and pressure. Increasing the temperature of a substance (with some exceptions) decreases its density by increasing the volume of that substance. In most materials, heating the bottom of a fluid results in convection of the heat from bottom to top of the fluid due to the decrease of the density of the heated fluid. |
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