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Making measurements and analysing data

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Question 5

A student measures the pressure of a fixed mass of gas in a constant-volume container using a pressure gauge calibrated in pounds per square inch (psi\text{psi}psi).

The gauge reading is recorded as 38.5±0.6 psi38.5 \pm 0.6\text{ psi}38.5±0.6 psi.

Convert this pressure reading into kilopascals (kPa\text{kPa}kPa), ensuring your answer is given to 3 significant figures. Coordinate the absolute uncertainty in the converted pressure value, giving it to 1 significant figure.

Use the following conversion factors:

  • 1 pound of force (lbf)=4.448 N1\text{ pound of force (lbf)} = 4.448\text{ N}1 pound of force (lbf)=4.448 N
  • 1 inch=0.0254 m1\text{ inch} = 0.0254\text{ m}1 inch=0.0254 m
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Making measurements and analysing data Questions

  1. A Level
  2. /Physics
  3. /Making measurements and analysing data