If the length of a side of a cube is measured as 2.0 ± 0.1 m, what is the maximu

Practice Questions

Q1
If the length of a side of a cube is measured as 2.0 ± 0.1 m, what is the maximum possible error in the volume of the cube?
  1. 0.8 m³
  2. 0.4 m³
  3. 0.2 m³
  4. 0.1 m³

Questions & Step-by-Step Solutions

If the length of a side of a cube is measured as 2.0 ± 0.1 m, what is the maximum possible error in the volume of the cube?
Correct Answer: 1.2 m³
  • Step 1: Understand that the volume of a cube is calculated using the formula V = L³, where L is the length of a side of the cube.
  • Step 2: Identify the given values: the length L = 2.0 m and the uncertainty in the length ΔL = 0.1 m.
  • Step 3: To find the maximum possible error in the volume, use the formula for maximum error in volume: ΔV = 3L²ΔL.
  • Step 4: Substitute the values into the formula: L = 2.0 m and ΔL = 0.1 m.
  • Step 5: Calculate L²: (2.0 m)² = 4.0 m².
  • Step 6: Multiply by 3: 3 * 4.0 m² = 12.0 m².
  • Step 7: Now multiply by ΔL: 12.0 m² * 0.1 m = 1.2 m³.
  • Step 8: Conclude that the maximum possible error in the volume of the cube is 1.2 m³.
  • Volume Calculation – Understanding how to calculate the volume of a cube using the formula V = L³.
  • Error Propagation – Applying the concept of maximum error in measurements to calculate the error in derived quantities.
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