Chapter 3, Problem 3.44P

Interpretation Introduction

(a)

Interpretation:

Convert 2600 mmHg to psi

Concept introduction:

One-unit system is usually used in science but less generally used in daily life, is called the 'SI' system or ‘International system’. The other system is the metric system widely used in United States.

Conversion tables can be used to directly convert values of these two systems.

From unit conversion tables we can get the following relationships.

1 mmHg is the pressure exerted by a 1 mm vertical column of mercury (Hg) and ‘psi’ is the pressure which results from a force of one pound apply to one square inch area.

Convert U.S. units to SI units as,

$\text{760}\text{mmHg}\text{=}\text{14}\text{.696}\text{psi}$

Interpretation Introduction

(b)

Interpretation:

Convert 275 ft H₂ O to kPa.

Concept introduction:

One-unit system is usually used in science but less generally used in daily life, is called the 'SI' system or ‘International system’. The other system is the metric system widely used in United States.

Conversion tables can be used to directly convert values of these two systems.

From unit conversion tables we can get the following relationships.

One ft H₂ O is defined as the pressure of one foot of water column.

Convert U.S. units to SI units as,

$\text{33}\text{.9}\text{ft}{\text{H}}_{\text{2}}\text{O}\text{=}\text{101}\text{.325}\text{kPa}$

Interpretation Introduction

(c)

Interpretation:

Convert 3.00 atm to N/cm²

Concept introduction:

There are two systems of units in use in the world. One-unit system is commonly used in science but less usually used in daily life, is called the 'SI' system or ‘International system’. The other system is the metric system widely used in United States.

Conversion tables can be used to directly convert values of these two systems.

From unit conversion tables we can get the following relationships.

‘atm’ is called the atmospheric pressure,is the pressure within the atmosphere of Earth.

Convert U.S. units to SI units as,

$\begin{array}{l}1atm=1.01325\times {10}^{5}N/m^2\\ 1m=100cm\end{array}$

Interpretation Introduction

(d)

Interpretation:

Convert 280 cm Hg to dyne / m².

Concept introduction:

There are two systems of units in use in the world. One-unit system is commonly used in science but less usually used in daily life, is called the 'SI' system or ‘International system’. The other system is the metric system widely used in United States.

Conversion tables can be used to directly convert values of these two systems.

From unit conversion tables we can get the following relationships.

1 mmHg is the pressure exerted by a 1 mm vertical column of mercury (Hg).

The dyne is defined as the centimeter-gram-second unit of force.

Convert U.S. units to SI units as,

$\begin{array}{l}760mmHg=1.01325\times {10}^{6}dynes/c{m}^2\\ 1m=100cm=1000mm\end{array}$

Interpretation Introduction

(e)

Interpretation:

Convert 20 cm Hg of vacuum to atm.

Concept introduction:

There are two systems of units in use in the world. One-unit system is commonly used in science but less usually used in daily life, is called the 'SI' system or ‘International system’. The other system is the metric system widely used in United States.

Conversion tables can be used to directly convert values of these two systems.

From unit conversion tables we can get the following relationships.

‘atm’ is called the atmospheric pressure,is the pressure within the atmosphere of Earth.

1 mmHg is the pressure exerted by a 1 mm vertical column of mercury (Hg).

The relationship between units,

$1atm=760mmHg$

Consider atmospheric pressure as 1 atm.

Interpretation Introduction

(f)

Interpretation:

Convert 25 psig to mm Hg.

Concept introduction:

There are two systems of units in use in the world. One-unit system is commonly used in science but less usually used in daily life, is called the 'SI' system or ‘International system’. The other system is the metric system widely used in United States.

Conversion tables can be used to directly convert values of these two systems.

From unit conversion tables we can get the following relationships.

1 mmHg is the pressure exerted by a 1 mm vertical column of mercury (Hg).

‘psig’ is pounds per square inch in gauge pressure.

Units can be converted as,

$760mmHg=14.696psig$

Interpretation Introduction

(g)

Interpretation:

Convert 25 psig to mm Hg (absolute).

Concept introduction:

There are two systems of units in use in the world. One-unit system is commonly used in science but less usually used in daily life, is called the 'SI' system or ‘International system’. The other system is the metric system widely used in United States.

Conversion tables can be used to directly convert values of these two systems.

From unit conversion tables we can get the following relationships.

1 mmHg is the pressure exerted by a 1 mm vertical column of mercury (Hg).

‘psig’ is pounds per square inch in gauge pressure.

Units can be converted as,

$760mmHg=14.696psig$

Interpretation Introduction

(h)

Interpretation:

Convert 325 mmHg to mmHg gauge.

Concept introduction:

Gauge pressure is defined as the zero reference pressure against ambient air pressure.

Interpretation Introduction

(i)

Interpretation:

Calculate 45 psi to cm of carbon tetrachloride.

Concept introduction:

There are two systems of units in use in the world. One-unit system is commonly used in science but less usually used in daily life, is called the 'SI' system or ‘International system’. The other system is the metric system widely used in United States.

Conversion tables can be used to directly convert values of these two systems.

From unit conversion tables we can get the following relationships.

Units can be converted as,

$\begin{array}{l}1ft=12in\\ 1f{t}^2=144i{n}^2\end{array}$

Height of the fluid column can be calculated as,

Height = Pressure / (Density. gravitational acceleration)