Pressure
Presentation
•
Science, Biology
•
10th Grade
•
Practice Problem
•
Easy
Samantha Argent
Used 43+ times
FREE Resource
7 Slides • 8 Questions
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Pressure
Thursday 4th February 2021
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Multiple Choice
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Pressure equation
Pressure is described as force applied per unit area.
Pressure is measured in Pascals (Pa).
Area is measured in m2.
Force is measured in Newtons (N).
If a force of 100 N is applied to an area of 10m2, the pressure would be equal to = 100 / 10.
Pressure = 10 Pa.
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Multiple Choice
A force of 225 N is applied to an area of 75 m2. What is the pressure?
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Open Ended
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Boyle's Law - Pressure in Gases
Boyle's law states that if temperature and number of particles remain constant then pressure and volume are inversely proportional.
PV = C
This means that pressure will increase as volume decreases.
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Boyle's Law
A sealed syringe contains 10 m3 of air at a pressure of 1 Pa. If the plunger is pushed so that the volume decreases to 4 m3, what will the new pressure be?
P1 = 1 Pa; V1 = 10 m3; V2 = 4 m3; P2 = ?
P2 = P1V1 / V2
P2 = 10 x 1 / 4
P2 = 2.5 Pa
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Multiple Choice
In a sealed system of a volume of 75 m3, there is a pressure of 25 Pa. To increase the pressure to 100 Pa, what should the new volume be?
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Open Ended
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Pressure in Liquids
Pressure in a liquid varies with depth.
We can find the pressure of a liquid within a column using the following equation.
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Open Ended
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Pressure in Liquid
The density of water is 1,000 kg/m3. Calculate the pressure exerted by the water on the bottom of a 2.0 m deep swimming pool. (Gravitational field strength = 9.8 N/kg).
h = 2.0 m; p = 1000 kg/m3; g = 9.8 N/kg.
P = 2.0 x 1000 x 9.8
P = 19'600 Pa.
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Open Ended
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Multiple Choice
A stone is dropped into a lake. Calculate the increase in pressure on the stone caused by the water when it sinks from 1 m deep to 6 m deep. (The density of water is 1,000 kg/m3 and gravitational field strength is 9.8 N/kg).
Pressure
Thursday 4th February 2021
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