Two 10-cm x 40-cm boards are mounted 2.5 cm apart as shown in Figure 7.29. Air at 20°C enters the passage formed by the boards. The chips on the boards produce a heat flux of 0.5 W/cm? from each board. For an air mass flow rate of 0.04 kg/s, find the highest chip surface temperature.

Two 10-cm x 40-cm boards are mounted 2.5 cm apart as shown in Figure 7.29. Air at 20°C enters the passage formed by the boards. The chips on the boards produce a heat flux of 0.5 W/cm? from each board. For an air mass flow rate of 0.04 kg/s, find the highest chip surface temperature.

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter3: Job Planning, Benchwork, And Layout

Section3.1: Understanding Drawings

Problem 9RQ: A dimension listed on an engineering drawing is known as the _______ _______.

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Concept explainers

Moment of Inertia

Inertia can be termed as a resistance offered by a body to change its state. A rigid body initially at rest will apply resistance when acted by an external force that tends to change its state of rest or velocity, or a body initially at motion will provide resistance in changing its state of velocity or motion for coming to a state of rest. In other words, Newton's first law of motion describes the law of inertia of a rigid body.

Question

Board is 10 cm into page.
q" = 0.5 W/cm? on both sides.
Air
2.5 cm
20 C
40 cm
igure 7.29

Two 10-cm x 40-cm boards are mounted 2.5 cm apart as shown in Figure 7.29. Air at 20°C enters
the passage formed by the boards. The chips on the boards produce a heat flux of 0.5 W/cm2
from each board. For an air mass flow rate of 0.04 kg/s, find the highest chip surface temperature.

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