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A hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. A small fan pulls the air in and forces it through the resistors where it is heated. If the density of air is 1.2 kg/m³ at the inlet and 1.05 kg/m³ at the exit, determine the percent increase in the velocity of air as it flows through the hair dryer.

A hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. A small fan pulls the air in and forces it through the resistors where it is heated. If the density of air is 1.2 kg/m³ at the inlet and 1.05 kg/m³ at the exit, determine the percent increase in the velocity of air as it flows through the hair dryer.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. A small fan pulls the air in and forces it through the resistors where it is heated. If the density of air is 1.2 kg/m³ at the inlet and 1.05 kg/m³ at the exit, determine the percent increase in the velocity of air as it flows through the hair dryer. The diagram illustrates the setup: - A duct showing airflow through it. - Two sections are indicated: the inlet with air density 1.2 kg/m³ and the exit with air density 1.05 kg/m³. - Arrows indicate the direction of airflow. - Electric resistors (depicted as a zigzag line) heat the air as it passes through. The increase in velocity is ______%.
Transcribed Image Text:A hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. A small fan pulls the air in and forces it through the resistors where it is heated. If the density of air is 1.2 kg/m³ at the inlet and 1.05 kg/m³ at the exit, determine the percent increase in the velocity of air as it flows through the hair dryer. The diagram illustrates the setup: - A duct showing airflow through it. - Two sections are indicated: the inlet with air density 1.2 kg/m³ and the exit with air density 1.05 kg/m³. - Arrows indicate the direction of airflow. - Electric resistors (depicted as a zigzag line) heat the air as it passes through. The increase in velocity is ______%.
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