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5th Edition

Saeed Moaveni

Publisher: Cengage Learning

ISBN: 9781305084766

Chapter 18, Problem 32P

Textbook Problem

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For the cooling of steel plates discussed in Section 18.4 (Figure 18.17) using linear interpolation, estimate the temperature of the plate at time equal to 1 hr, from the temperature data at 0.8 hr and 1.2 hour. Compare the estimated temperature value to the actual value of 308° C. What is the percentage of error?

To determine

Estimate the temperature of plate at

**Given data: **

Refer to Figure 18.17 in section 18.4 in textbook,

The value of temperature at

The actual value of temperature at

The value of temperature at

**Formula used:**

Formula to calculate the error is,

**Calculation:**

Refer to Figure 18.17 in textbook, the graph shows the relationship between temperature and time.

To find the value of temperature at

Therefore, to find the temperature at

From the Figure 1, draw the two similar triangles

Using similar angle theorem,

Refer to Figure 2,

The values for

Substitute

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

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