Physics - Unit & Dimension Question with Solution | TestHub

PhysicsUnit & DimensionMiscellaneousMedium2 minQB

PhysicsMediumnumerical

Add $6.75 \times 10^{3} c m$ to $4.52 \times 10^{2} c m$ with regard to significant figures. Give the answer in units of $10^{3} c m$ .

Answer:

7.20

Solution:

$b = 4.52 \times 10^{2}$ cm $= 0.452 \times 10^{3}$ cm

$a + b = 6.75 \times 10^{3} + 0.452 \times 10^{3}$

$= 7.202 \times 10^{3}$ cm

The least accurate term ( $6.75 \times 10^{3}$ ) is known to the second decimal place in these units, so the sum rounds to $7.20 \times 10^{3}$ cm.

Subject:PhysicsTopic:Unit & DimensionSubtopic:Miscellaneous

⏱ 2mℹ️ Source: QB

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