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15 Questions

5 Views

Physics: Pressure and Units

Created by

@PoliteAllegory

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Questions and Answers

What is the equivalent of 1 bar in units of Pa?

1020 Pa

105 Pa (correct)

100 Pa

10 Pa

What is the absolute pressure measured relative to in all calculations of state?

Absolute zero pressure (correct)

Gauge pressure

Atmospheric pressure

Relative pressure

What is the equivalent of 1 atm in units of bar?

0.101325 bar

10.1325 bar

0.013325 bar

1.01325 bar (correct)

What is the unit of pressure that is equal to 760 mmHg?

1 atm Signup and view all the answers

What is the equivalent of 1 MPa in units of kPa?

1000 kPa Signup and view all the answers

What type of pressure measurement is often used in real-world applications?

Gauge pressure Signup and view all the answers

What is the term for pressure measured relative to atmospheric pressure?

Gauge pressure Signup and view all the answers

What is the reference point for gauge pressure measurement?

Atmospheric pressure Signup and view all the answers

What type of pressure is measured with respect to a complete vacuum?

Absolute pressure Signup and view all the answers

What is the term for pressure measured with respect to the surrounding environment?

Gauge pressure Signup and view all the answers

What is the unit of pressure in the SI system?

N/m2 Signup and view all the answers

What is the unit of pressure in the English system?

lbf/in2 absolute Signup and view all the answers

What is the force per unit area called?

Pressure Signup and view all the answers

What is the equivalent of Pascal in the SI system?

N/m2 Signup and view all the answers

What is the unit of pressure that is not mentioned in the passage?

bar Signup and view all the answers

Study Notes

Units of Pressure

1 bar is equivalent to 105 Pa, 102 kPa, and 0.1 MPa
1 atm (atmospheric pressure) is equivalent to 1.01325 bar, 14.696 psia, and 760 mmHg

Pressure Measurement

Pressure is measured relative to absolute zero pressure in all calculations of state
Pressure can be measured relative to atmospheric pressure, which is called gauge or vacuum pressure

Definition of Pressure

Pressure is defined as force per unit area
The unit of pressure is the Pascal (Pa) in the SI system, which is equivalent to N/m2
In the English system, the unit of pressure is psia (pound-force per square inch absolute) or lbf/in2

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Description

Learn about pressure, its definition, and units in both the SI and English systems. Understand the concept of force per unit area and its measurement.