All the AS and A2 specifications contain a list of the same 12 How science works statements that you should understand. In this issue of PHYSICS REVIEW we look at the following:
Table 1 gives some data for an experiment in which the volume of gas in a tube was compressed at constant temperature. The type of equipment used for this experiment is shown in Figure 1. To analyse the data we need to know a little about how accurate they are likely to be. For example, what is the sensitivity of the equipment? You can see that the volume of gas is contained not in a spherical container, but in a narrow tube. This makes it easier to measure small changes in volume with precision because the narrower the tube the larger the change in length of the column, for the same change in volume. It also means that the tube can be marked with a linear scale showing the volume.
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