Level 4

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Level 4

I can calculate uncertainties, when the formula for the quantity contains a power or exact numbers.

A student measures the weight and side length of a metal cube. Her measurements are shown in the picture. What should be the student's value for the pressure exerted by the cube on a smooth, horizontal surface.

1 point

(5.6 ± 0.1) kPa

(5.6 ± 0.2) kPa

(5.6 ± 0.3) kPa

(5.6 ± 0.4) kPa

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A student measures the height of a metal cylinder using a ruler and the diameter using Vernier calipers. Her measurements are shown in the picture. What should be the student's value for the volume of the cylinder?

1 point

(1.14 ± 0.02) x10-4 m3

(1.14 ± 0.05) x10-4 m3

(1.1 ± 0.01) x10-4 m3

(1.1 ± 0.2) x10-4 m3

Clear selection

A student rolls a trolley from rest down a ramp. She uses a light gate to measure the trolley's velocity at the bottom and an electronic balance to measure the mass of the trolley afterwards. Her measurements of the velocity and mass are shown in the picture. What should be the student's value for the kinetic energy of the trolley at the bottom of the ramp?

1 point

(0.131 ± 0.006) J

(0.131 ± 0.007) J

(0.13 ± 0.01) J

(0.13 ± 0.04) J

Clear selection

A student measures the diameter of a marble using a micrometer. His measurement is shown in the picture. What should be the student's value for the volume of the marble?

1 point

(1.23 ± 0.009) cm3

(1.23 ± 0.01) cm3

(1.23 ± 0.02) cm3

(1.23 ± 0.03) cm3

Clear selection

A student carries out an experiment to determine the resistivity of a Nichrome wire. She measures the resistance R, length l and diameter d of the wire. Her measurements are shown in the picture. Using the student's results, the resistivity of Nichrome is:

1 point

(1.4 ± 0.1) × 10-6 Ωm

(1.4 ± 0.2) × 10-6 Ωm

(1.43 ± 0.01) × 10-6 Ω

(1.43 ± 0.22) × 10-6 Ωm

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