Explain the relation betwwen thermal diffusivity and thermal conductivity and why do we have two different quantities having similar meaning for heat transfer but not have for mess transfer.

Q: Radiation heat transfer needs a media to occur where as conduction and convection is not.

A: We have to tell whether radiation heat transfer needs a media to occur.

Q: Prandtl number is the ratio of: 1. Momentum diffusivity to mass diffusivity 2. Momentum diffusivity…

A: Pradntl number is the ratio of momentum diffusivity to thermal diffusivity. It is denoted by Npr.…

Q: Show the derivation of heat conduction equation in spherical coordinate system (1D). 1 a r2k- r² ar…

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Q: All are reagents used in the experiment on the determination of surface tension of a liquid by the…

A: Introduction The capillary rise method is a test conducted to determine the surface tension of a…

Q: 5) What is the difference between natural convection and forced convection? 6) What is the reason of…

A: (5) Natural convection, also known as free convection, is a mass and heat transfer process in which…

Q: Explain in your own words why electronic transitions are considered dipole-moment allowed.

A: To explain Why electronic transitions are considered dipole-moment allowed

Q: explain the relation between thermal diffusivity and thermal conductivity. And why do we have two…

A: Thermal conductivity is defined as the ability of a material to conduct heat. It is the heat…

Q: Show the derivation of heat conduction equation in cylindrical coordinate system (1D). 1 a ans ƏT…

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Q: water. 11-78 A shell-and-tube heat exchanger with two shell passes and eight tube passes is used to…

A: 11.78  For the ethyl alcohol, from the energy balance equation, Q = mCp∆TcQ =…

Q: The thermal conductivity of a single-crystal ceramic specimen is slightly greater than that of a…

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Q: The aim is to reduce the thickness of the first steel wall. Between the two walls there is a…

A: Given : Height Thickness Width Expansion rate Weight of wax

Q: please give a precise answer

A: In summary it is due to :  1. Metals have larger number of free electrons2. Metal have smaller gap…

Q: Derive an expression for the heat exchange between two black bodies

A: Consider two black radiating bodies of area A1 and A2 . Heat exchange between two elementary areas…

Q: What is potential energy surface (PES)? Draw PES to represent the variation of energy during…

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Q: 1. _Give the Dimensional Analysis to explain the three cadres of the Mass Transfer and their…

A: Dimensional analysis in mass transfer  Mass transfer stands for the net movement of mass from one…

Q: 12. Plunging heated metal to water for annealing is an example of

A: For Annealing process ,plunging heated metal to water

Q: In a desert chemical plant, the operator wishes to store chilled water underground in a spherical…

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Q: True or false 1. Electrical conductivity of copper is very low

A: Electrical conductivity is the measurement of the transport of the electric charge through the…

Q: (b) Fig. Q2(b) shows the isothermal transformation diagram for hypo-eutectoid steel. Sketch and…

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Q: The thermal conductivity of a gas is larger than that of a liquid. O no O yes

A: Thermal conductivity:

Q: Why the thermal conductivity of metal decreases with the increase in temperature. and   Why the…

A: The reason for the decrease in thermal conductivity of the metal with increase in temperature is to…

Q: Given the following for a simple, cocurrent exchanger: tube outside diameter, Do = 0.75 inches tube…

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Q: In all cases, the thermal conductivity increases as the mean free path of the energy carriers is…

A: Mean free path is defined as the average distance an object move between collision. Thermal…

Q: B-Compare between Kerosene and Lube oil according to the following(Put > or <) 1- Kerosene 0 Lube…

A: Crude oil is formed down below the Earth's crust. This oil is consists of many hydrocarbons which…

Q: B. Below is an image of typical data for the thermal analysis of a polymer sample on differential…

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Q: 8. For polytropic process the heat and work can not cross the boundary of the system * False True

A: Given, Concept of Polytropic Process Find,  For polytropic process the heat and work cannot cross…

Q: Specific heat capacity is constant for all materials Select one: O True O False

A: Answer: False

Q: Explain how does thermal conductivity of solid,liquid depend upon the temperatures .

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Q: if the cooled seawater enters the air gap membrane distillation, is there a loss in hot steam that…

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Q: Verify that thermal conductivity

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Q: QI- Consider the composite structure shown in the figure. 1. sketch the equivalent thermal…

A: 1) The equivalent thermal resistance is as follows: Here, RA, (RB + RC), and (RD+RE) are all…

Q: What are the reasons for a tubular heat exchanger's internal leak? Describe the baffle rod's role in…

A: Internal leaks in tubular heat exchangers can occur due to various reasons.(1) Corrosion, erosion,…

Q: For heat transfer, We have thermal diffusivity and thermal conductivity. But For mass transfer, We…

A: Thermal conductivity is defined as the ability of a material to conduct heat. It is the heat…