length and time

Question 1

Distance

Answer 1

Question 3

volume

Answer 3

Measuring cylinders can be used to measure the volume of liquids or, by measuring the change in volume, the volume of an irregular shape.

Question 4

Micrometer Screw Gauge

Answer 4

Question 5

Time

Answer 5

Stopclocks and stopwatches can be used to measure time intervals.

An important factor when measuring time intervals is human reaction time. This can have a significant impact upon measurements when the measurements involved are very short (less than a second).

Question 6

Multiple Readings

Answer 6

Suppose you have to measure the thickness of a sheet of paper. The thing that you are trying to measure is so small that it would be very difficult to get an accurate answer.

If, however, you measure the thickness of 100 sheets of paper you can do so much more accurately. Dividing your answer by 100 will then give an accurate figure for the thickness of one sheet.

This process of taking a reading of a large number of values and then dividing by that number, is a good way of getting accurate values for small figures, including (for example) the time period of a pendulum – measure the time taken for 10 swings and then divide that time by 10.