Judge the assertion and the reason

Exercise and reference answers

Questions

1. Reason

   The heat current is inversely proportional to the length of the bar.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   A long bar conducts heat more slowly than a short one of the same material.

2. Reason

   There are three distinct modes of heat transfer.

   Verdict

   Both are true; the reason does not explain the assertion.

   Assertion

   Water behaves anomalously between zero and four degrees Celsius.

3. Reason

   No heat at all enters or leaves during a change of state.

   Verdict

   The assertion is true and the reason is false.

   Assertion

   Temperature stays constant while a substance changes state.

4. Reason

   Heat is energy transferred by virtue of a temperature difference.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   Heat and temperature are the same physical quantity.

Instructions

Read both statements, then pick the verdict that fits.

Explanation