What are the principal means by which heat is transferred from hot body to a cold...
What are the principal means by which heat is transferred from hot body to a cold body when they are separated by
(i) a vacuum, and
(ii) a silver bar? Explain your answers.
Homework Answers
Heat always spontaneously flow from higher temperature to lower temperature and means are -
- In vacuum, heat transfer mode is by radiation only in the form electromagnetic radiation energy.
- In sliver bar, heat is transfered by conduction mode . In solids, vibration of atoms causes heat to be transferred.
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What are the principal means by which heat is transferred from
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and hot stream heat transfer rate for a heat exchanger? is it
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Conditions:
1. Cp for hot and cold fliuds are the same.
2. There is heat loss/gain from environment.
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what is the relationship between cold stream volume flow rate
and hot stream heat transfer rate for a heat exchanger? is it
approximately linear? Could you provide a theoretical proof for
that？
Conditions:
1. Cp for hot and cold fliuds are the same.
2. There is heat loss/gain from environment.
2n = act as QH = Cf Fcold (Tez-tc.) + Ås H Qr: hot stream heat transfer rate àci cold stream heat transfer rate Ås: heat transfer rate of rate...
HoMEWORK FOR INTRODUCTION TO HEAT AND TEMPERATURE 1. Approximately what is human body temperature on the Celsius temperature scale? Which is better at transferring heat, water or air? How does this fact explain the length of time it takes the temperature probe to reach thermal equilibrium with the air or water it is in? 2. 3. What effect does the evaporation of water have on the object from which it is evaporating? When has your body experienced this effect? 4....
11.20 Heat exchanger of counter flow arrangement with temperatures at inlet of hot and cold fluids are (200°C) and (60°C) gave outlet temperature of (110°C) for both sides as the surfaces were clean. After long time of use for same the inlet temperatures and flow rate, the hot fluid outlet was (130°C). Find the change in the overall heat transfer coefficient and the heat transfer values by percentage. Ans.: -37.4%, -22.2% 11.21 A liquid with a specific heat of (3200J/kg....
Can you please explain to me how to do this question?
$3 Heat and heat trangfer H&T 176 The following two exercises illustrate how the concept of heat transfer can be used to predict the equilibrium temperature of a mixture of hot and cold water Exercise 3.4 we mix 6 g of water at 34°C and 5 g of water at 23°C. The description of the interaction in terms of heat transfer is illustrated at right. Heat A. How much...
Question 8 Part A By what means is heat transferred by convection? transfer of heat by flowing electrons transfer of heat by electromagnetic radiation transfer of heat by transferring vibrational energy from one atom to its neighbors transfer of heat by motion of a fluid > Submit Request Answer Provide Feedback Pearson Copyright © 2020 Pearson Education Inc. All rights reserved. Terms of Use Privacy physics.com/myct/itemView?assignment ProblemiD. MacBook Air $ 3 5
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