Question

Explain the Rules for determining significant figures. Obtain dimensions of following quantities
1)Momentum 2)Impulse 3)Pressure

Answer 1

Answer:

To determine the number of significant figures in a number use the following 3 rules:

Non-zero digits are always significant.

Any zeros between two significant digits are significant.

A final zero or trailing zeros in the decimal portion ONLY are significant.

Momentum: MLT−1

Impulse: Impulse has the same units and dimensions (M L T−1) as momentum.

Pressure: [M L-1 T-2]

Explanation:

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