Photo AI
Figure 3 shows a diver swimming in a lake - Edexcel - GCSE Physics - Question 2 - 2019 - Paper 1
Question 2
Figure 3 shows a diver swimming in a lake. The pressure on the diver is due to both the water above him and the Earth's atmosphere. The pressure of air on the surf... show full transcript
Worked Solution & Example Answer:Figure 3 shows a diver swimming in a lake - Edexcel - GCSE Physics - Question 2 - 2019 - Paper 1
Step 1
How many atmospheres of pressure will be on the diver at a depth 20m?
Answer
To determine the pressure on the diver at a depth of 20m, we need to consider both the atmospheric pressure and the pressure due to the water column.
- At a depth of 10m, the pressure due to water is equivalent to 1 atmosphere.
- Therefore, at a depth of 20m, the pressure due to the water would be:
- .
- Since the atmospheric pressure above the water is 1 atmosphere, the total pressure on the diver at this depth is:
- Total pressure = pressure from water + atmospheric pressure = 2 atmospheres + 1 atmosphere = 3 atmospheres.
Thus, the diver experiences a total pressure of 3 atmospheres at a depth of 20m.
Step 2
Calculate the pressure that the container exerts on the floor.
Answer
To calculate the pressure exerted by the container on the floor, we first need to determine the area in contact with the floor.
- The area (A) of the base of the container can be calculated using:
- .
- Using the formula for pressure:
- Pressure = .
- Substituting the values into the equation:
- Pressure = .
Thus, the pressure that the container exerts on the floor is 1250 Pa.