Physics · Oct / Nov 2021 · Paper 61 · Question 4
0625
As printed in the paper
The question as text
A student investigates the time taken to heat water in different uninsulated containers. The containers all have the same volume and shape. The water is heated with an electric immersion heater. The following apparatus is available: a selection of containers measuring cylinder thermometer supply of cold water immersion heater with power supply. Plan an experiment to investigate the time taken to heat water in different uninsulated containers. You should: • list any additional apparatus that is required • explain briefly how you would carry out the investigation • state the key variables that you would keep constant • draw a table, or tables, with column headings to show how you would display your readings (y not required to enter any readings in the table) • explain briefly how you would use your readings to reach a conclusion.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
MP1
Apparatus: (stop)watch / clock / timer
MP2
Method: Heat water in a container to a specified temperature or to boiling point
MP3
Method: Repeat for at least two additional containers
MP4
Constant Variable: Volume of water
MP5
Constant Variable: Starting temperature (of water)
OR room temperature OR power of heater
MP6
Table with columns to match their method. If MP2 correct, this needs type of container and time with unit (s)
MP7
Compare times / durations (for the various containers) OR see which takes longer.
Additional graph notes:
NOTE: The principle to apply here is ‘could I draw a significantly better line, using these points, under examination conditions?’ If the answer is definitely ‘yes’, do not award the mark.
NOTE: If candidate’s scale consists of actual readings at equal intervals this will produce a perfect straight line! The only mark available in this case is the first (axes right way round and labelled) So maximum 1.
If axes are wrong way round, the other 3 marks are still available.
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