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0.000 s

A useful method of expressing very small or very large numbers is:

Scientific notation.

Roman numerals.

Arabic numerals.

The metric system.

Is a temperature of 30o C warm or cold to man?

Cold.

Warm.

Which of the following experimental techniques reduces the systematic error of the quantity being investigated?

Measuring the diameter of a wire repeatedly and calculating the average.

Adjusting an ammeter to remove its zero error before measuring a current.

Timing a large number of oscillations to find a period.

Plotting a series of voltages and current readings for an ohmic device on a graph and using its gradient to find resistance.

This gauge is most probably used to measure:

Speed.

Amplitude.

Voltage.

Current.

Which is the smallest division on a rule?

1m.

1mm.

10dm.

1cm.