Q3.4
The focus in this question was not on getting the correct unit per se; just to get the correct product from volume and pressure. Hence, 3 (which is the value in J) is also acceptable as an answer in addition to the 3000 (which is the value in mJ). Please note that learners do not need to state "3000 mJ". For that reason, if they state only "3", award the mark.
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