Physics Easy Uploaded: 10 Jul 2026

Which statement correctly describes a non-physical quantity?

Correct Answer: Option C — It usually depends on perception or interpretation

Explanation:

Non-physical quantities such as beauty, wisdom and affection cannot be measured directly with scientific instruments.

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Which rounding rule applies when the first dropped digit is less than 5?

Why were standard units introduced?

When rounding off, if the first dropped digit is greater than 5, the retained digit is:

Which of the following is a complete measurement?

If repeated readings are close to each other but not near the true value, they are:

Which SI base unit and symbol are correctly matched?

Accuracy of a measurement means:

Which derived unit is equivalent to metre per second?

Precision of a measurement depends mainly on:

Which prefix represents 10^-9?