Assertion and reason

Exercise and reference answers

Questions

1. Reason

   A unit is the standardised reference the number is counted against.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   A measurement without a unit is meaningless.

2. Reason

   Derived units are combinations of base units.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   The newton can be written using base units alone.

3. Reason

   The SI system rests on seven base quantities.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   Force is an SI base quantity.

Explanation