A student caries out an experiment in which a column of liquid glycerol flows through a narrow glass tube. The time taken for the top of the glveerol column to fall a known distance between two markers is measured with a stopwatch. The experiment is repeated at different temperatures. The student records the following results.

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Q5
A student caries out an experiment in which a column of liquid glycerol flows through
a narrow glass tube. The time taken for the top of the glycerol column to fall a known
distance between two markers is measured with a stopwatch. The experiment is
repeated at different temperatures.
The student records the following results.
Temperature / °C
Time taken /s
Average speed / m s'
26.5
4.2
0.019
35.5
2.4
0.033
0.053
42.5
1.5
50.0
1.2
0.067
61.5
0.5
0.160
(a) (i) The table shows the average speed of flow for four of the temperatures.
Calculate the missing value and enter it in the table. The distance between the
markers is 0.080 m.
Averaje speed-dxtanen
Time Tadens
1.5
(ii) Add this point to the graph below and draw a best-fit line for the student's data.
0.18
0.16
0.14
ST
0.12
0.10
0.08
0.06
0.04
0.02
0.00
10
20
30
40
50
60
70
Temperature / °C
Transcribed Image Text:Q5 A student caries out an experiment in which a column of liquid glycerol flows through a narrow glass tube. The time taken for the top of the glycerol column to fall a known distance between two markers is measured with a stopwatch. The experiment is repeated at different temperatures. The student records the following results. Temperature / °C Time taken /s Average speed / m s' 26.5 4.2 0.019 35.5 2.4 0.033 0.053 42.5 1.5 50.0 1.2 0.067 61.5 0.5 0.160 (a) (i) The table shows the average speed of flow for four of the temperatures. Calculate the missing value and enter it in the table. The distance between the markers is 0.080 m. Averaje speed-dxtanen Time Tadens 1.5 (ii) Add this point to the graph below and draw a best-fit line for the student's data. 0.18 0.16 0.14 ST 0.12 0.10 0.08 0.06 0.04 0.02 0.00 10 20 30 40 50 60 70 Temperature / °C
(1) Use these results to explain how the viscosity of glycerol varies with
temperature.
(6) This experiment depends on the flow remaining laminar and not becoming turbulent.
(1) Explain these two terms and complete the diagrams to illustrate each type of
flow through a vertical tube.
laminar
turbulent
(1i) Explain the effect turbulence would have on the rate of flow.
Transcribed Image Text:(1) Use these results to explain how the viscosity of glycerol varies with temperature. (6) This experiment depends on the flow remaining laminar and not becoming turbulent. (1) Explain these two terms and complete the diagrams to illustrate each type of flow through a vertical tube. laminar turbulent (1i) Explain the effect turbulence would have on the rate of flow.
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