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2.1 Equipment list
item, (quantity)
drill (1)
15mm, 1m pipe (1)
20mm, 1m pipe (1)
glue gun (1)
500ml container (1)
retort stands (7)
stools (4)
nail (1)
transparent straws (12)
permanent marker (1)
2.2 Diagrams of experimental setup
2.3 Procedures
Drill 4 holes on the upper walls of the container to place retort stands into them to ensure that the water dispenser is tightly secured.
Drill 3 holes along the pipe and secure the straws in place with a glue gun. Ensure that all straws are of the same length.
Set up the experiment as shown in the diagram above, placing the water dispenser on the stool, connecting the pipe connectors and the pipes attached with straws.
Once the setup is complete, get a bucket of water and dye the water with dark food colouring for more obvious results.
Pour the coloured water into the water dispenser and ensure that the tap is closed.
Once all the water has been poured into the water dispenser, open the tap and allow the water to flow.
Observe the water flow to the straw and record a video of the whole process.
To calculate the height of water, rewatch the video and screenshot two instances from the video where all the straws contain water.
From the screenshots, measure the height of water in the straws according to the pictures. Measure the height of the straws in real life and do an estimation of the water level in the straw in real life.
2.4 Data analysis
After finding out the results, place them into the table below
11. Plot a graph according to results to show the drop in pressure in the straw.
12. From the graph we can then conclude whether our hypothesis is correct.
2.5 Risk, assessment and management:
Identify any potential risks and safety precautions to be taken.
#1
Risk : The experiment consists of drilling the container for a hole to put in the pipe, there might be a chance that someone might get injured.
Assessment : Medium
Management : Ask a teacher for guidance/supervision when doing the procedure, if it is too dangerous, get a teacher to help you do it.
#2
Risk : When handling with water, there might be spills, hence making the floor wet, causing people to slip and fall.
Assessment : Medium
Management : Clean the floor if is wet, ensure no one is walking on and across the wet floor for their safety.
#3
Risk : The glue gun is hot, if not handled properly someone might get scalded.
Assessment : Medium
Management : Get adult supervision or wear gloves to prevent getting scalded.
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