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Q: Which of the following substance density is greater than the density of water?
  • A. Cork
  • B. Ice
  • C. Iron nail
  • D. Thermocol
Correct Answer: Option C - The density of iron nail is higher than the density of water, so it will sink into the water, while the density of the materials given in the other three options is less than the density of water, these three will float.
C. The density of iron nail is higher than the density of water, so it will sink into the water, while the density of the materials given in the other three options is less than the density of water, these three will float.

Explanations:

The density of iron nail is higher than the density of water, so it will sink into the water, while the density of the materials given in the other three options is less than the density of water, these three will float.