U1.5 – Errors & Uncertainties

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Errors and Uncertainties

1 / 12

Select the missing word: _______ errors affect accuracy.

2 / 12

Select the missing word: _______ errors affect precision.

3 / 12

Which is not an action to reduce random errors in an investigation.

4 / 12

A student measures the temperature of boiling water (100°C) with a thermometer with an uncertainty of ± 2°C. Select the range where the true value could be.

5 / 12

How could you reduce percentage uncertainty?

6 / 12

A student places an item onto a balance in order to obtain its mass. They record the mass as 12.54 g. What’s is their absolute uncertainty for the mass reading?

7 / 12

A group of students time a ball bearing dropping through a tube of glycerol. They record the following times, in seconds: 9.2, 9.0, 8.9, 8.9 and 9.5. What is the uncertainty?

8 / 12

A ammeter with an uncertainty of ± 0.1 A displays a decrease in current from 7.2 A to 4.1 A, what is the difference in current?

9 / 12

The radius of a cheesecake in the staff room is 7.5 ±0.5 cm, what is the percentage uncertainty for the area of the cheesecake?

10 / 12

A mass of 3 ± 0.2kg is accelerated 10 ± 0.15 ms-1. Calculate the force applied.

11 / 12

A ruler with an uncertainty of ± 0.5 mm measures the length of a Subway Footlong to be 292 mm, what is the uncertainty in the measurement.

12 / 12

Calculate the percentage uncertainty of line c (dashed).

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