Multiple choice general knowledge science & technology

Which of the following fluids at room temperature will cool a ½ inch thick piece of hot steel the fastest

  1. pure water

  2. 5% salt water

  3. 25% salt water

  4. motor oil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pure water has the highest specific heat capacity (4.18 J/g°C) and thermal conductivity among the options, enabling it to absorb heat most rapidly. Salt water has slightly lower specific heat capacity. Motor oil has much lower heat capacity and thermal conductivity, making it the slowest coolant.

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