Figure 5 shows a diver - AQA - GCSE Physics Combined Science - Question 3 - 2018 - Paper 1
Question 3
Figure 5 shows a diver.
The diver is using a canister of compressed air so that he can breathe underwater.
Figure 5
Canister of compressed air
Which two sentences ... show full transcript
Worked Solution & Example Answer:Figure 5 shows a diver - AQA - GCSE Physics Combined Science - Question 3 - 2018 - Paper 1
Step 1
Which two sentences describe the movement of the air particles in the canister?
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Answer
The correct choices are:
They move in random directions.
They move with a range of different speeds.
Step 2
What happens to the movement of the air particles?
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Answer
The mean speed of the particles would increase, leading to greater kinetic energy.
Step 3
Explain why.
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Answer
If the temperature increases, the pressure inside the canister can increase significantly, posing a risk of explosion due to large pressure differences.
Step 4
Estimate the atmospheric pressure.
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Atmospheric pressure = 0.1 MPa.
Step 5
Determine the maximum time the diver can safely stay underwater.
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Answer
The maximum time the diver can safely stay underwater is 27 minutes.
Step 6
What happens to the volume of the air when it is released from the canister?
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Answer
The volume of the air increases as it is released from the canister.
