Explain how does thermal conductivity of gases, liquids and solids depend upon the temperature.

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: In a heat transfer problem, U is a function of? temperature and time length and time O width and…

A: U represent in heat transfer function is overall heat transfer coefficient which is time dependent…

Q: The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C,…

A: Given  Temperature inside wall T1 = 18 oC Temperature outside of wall T2 =48 oC Conductivity of wall…

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: For a stream of water (at 32 °C) flowing over a plate at a constant surface temperature of (90 °C)…

A: Given:  T∞ = Twater = 32 oC            Thermal conductivity of water at 32 oC = 0.6 W/m.k…

Q: 2) Three materials are connected as the following figure. The heat conductivity coefficient of…

A:

Q: The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C,…

A: As per our guidelines, we are supposed to answer only 3 sub parts.

Q: 7.) The czpnduction heat transfer rate through a wall is modeled by the following equation: Q = k4AT…

A:

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: Viscosity varies with temperature according to which of the graphs below?

A: How does viscosity vary with temperature?

Q: On the same graph paper show how the heat flow during a DSC analysis and the elastic modulus of a…

A: DSC analysis is differential scanning calorimetry analysis. It is used to measure the effect of heat…

Q: heat conduction

A: Heat Conduction is the transfer of thermal energy from higher temperature to lower temperature in…

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

A: For Annealing process ,plunging heated metal to water

Q: It is the transfer of energy as a result of a temperature difference between the system and the…

A: Heat is the transfer of thermal power from a system to its environment or from one object to some…

Q: The inner and outer surfaces of a pane of plain glass, which is 0.4 cm thick and has an area of 2 m…

A: Given, The area of the glass, A = 2 m×2 m = 4 m2 The thickness of the glass, ∆x = 0.4 cm The…

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: What happens to the vapor pressure of a substance when its surface area is increased at constant…

A: The effect on the vapor pressure of a substance as its surface area increased is to be determined…

Q: Calculate the heat flow every 1.7 hours through the outside fluid film from a 16.2 m² flat vertical…

A: Given data are as follows: Area of wall = 16.2 m2. Convective heat transfer coefficient h = 7W/m2-K…

Q: The inner and outer surfaces of a 0.5-cm-thick 2 m x 3 m window glass in summer are 48°C and 18°C,…

A: GIVEN THAT  INSIDE TEMPERATURE T1 = 18oC Out side temperature T2 = 48oC Heat trasfer area A = 2×3…

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

A:

Q: Temperature difference is not the driving force for heat transfer. O yes O No

A: heat transfer is the change in thermal energy by difference in temperature of two body let say…

Q: A certain matenial 2.5 em thick, with a cross-sectional area of 0.1 m, has one side maintained at…

A: Given, T3=95oC,T2=62oC,T1=35oC,∆x=0.025 m Assume Linear variation of thermal conductivity,…

Q: TEMPERATURE GRADIENTS: A room has external wall with a U-value of 2.5 W/m2 K and contains air at…

A:

Q: Heat is negative when when transferred from the system to the surroundings True False

A: Heat: It is a form of energy which transfers from hotter body to colder body by thermal radiation.…

Q: The thermal conductivity is directly proportional to the density of the gas. O No O yes

A: Thermal conductivity is a fabric property. It will no longer range with the dimensions of a…

Q: What happens to the radiant energy when it is incident upon a surface? Give the general equation…

A: The condition of the radiant energy when it is incident upon a surface is to be mentioned along with…

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: Calculate the heat loss from a double-pane glass window consisting of two pieces af glass, each…

A: Given: The window is made up of a glass of thickness i.e. L1 = L2 = 10 mm or 0.01 m each and in the…

Q: Explain analogy between heat and momentum transfer

A: The most widely accepted analogy between Heat, mass and momentum transfer is Chilton-Colburn…

Q: In boiling point experiment the open :side of capillary tube set .Up- inside test tube .Down -…

A: In heat transfer, The boiling point of a liquid may be defined as the temperature at which the vapor…

Q: Define the temperature of liquid nitrogen exposed to the atmosphere remains constant.

A: Liquid Nitrogen - Temperature -195.79 oC( 77K , -320 oF ). This the boiling point of liquid…

Q: As shown in the figure below, the left end of the cylindrical solid bar (radius: r, thermal…

A:

Q: is Soliton and Polaron? Explain in detail.

A: Answer-Resistance is the physical properties of a substance because of which it oppose the flow of…

Q: Estimate the thermal conductivity of benzene at 30C.

A: Temperature= 300CDensity of benzene at 300C ,d= 875 kg/m3Molar mass of benzene, M = 78specific heat…

Q: A long homogeneous resistance wire of radius ro = 5 mm is being used to heat the air in a room by…

A: resistance wire is used to heat the room by passage of electric current. Heat is uniformally…

Q: Please provide one-dimensional heat conduction equation in a large plane wall starting from energy…

A: For A large plane wall Find-One-dimensional heat conduction equation

Q: Explain how does thermal conductivity of gases, liquids and solids depend upon the temperature.

A: Thermal conductivity of gases, liquids and solids depend upon the temperature is as follows

Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.