A thermometer reading 75 °F is taken out where the temperature is 20 °F. The reading is 30 °F 4 min later. Find (a) the thermometer reading 7 min after the thermometer was brought outside and (b) the time taken for the reading to drop from 75 °F to within a half degree of the air temperature. Ans. (a) 23 °F:(h) 11 5 min

A thermometer reading 75 °F is taken out where the temperature is 20 °F. The reading is 30 °F 4 min later. Find (a) the thermometer reading 7 min after the thermometer was brought outside and (b) the time taken for the reading to drop from 75 °F to within a half degree of the air temperature. Ans. (a) 23 °F:(h) 11 5 min

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.

Question

2. A thermometer reading 75 °F is taken out where the temperature is 20 °F. The reading is
30 °F 4 min later. Find (a) the thermometer reading 7 min after the thermometer was
brought outside and (b) the time taken for the reading to drop from 75 °F to within a half
degree of the air temperature.
Ans. (a) 23 °F; (b) 11. 5 min
60

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