4. Assume that the viscosity of a glass varies with temperature according to the following Eq.: AGis 7 = A exp RT At 1700 K it has a viscosity or 20 N s m2; at 1500 Kit is 100 N s m2.

Q: %3D A furnace is to be built with a layer of firebrick (k = 1.50 W/m-K) on the inside. This is…

A: Given: k1=1.5 Wm.K; T1=1200 °C; T2=70 °Ck2=0.15 Wm.K; L2=0.2 m k3=1 Wm.K; L3=0.15 mgiven that the…

Q: be black-anodized and thus to have an effective emissivity of 0.90. Note that in radiation…

A: I already do that question so I know question 6.9. this is given below

Q: The insulation bricks of 0.3 m, and then buildind bricks of 0.2 m were applied to the firebrick of…

A:

Q: Athin isothermal disk, having a diameter of 1.8 cm, is maintained at 40◦C and buried in a…

A: Given  thermal conductivity k= 0.8 W/m· ◦C  diameter of disk is D = 1.8 cm  radius = 0.9 cm = 0.009…

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: A cylindrical shape is with diameter of 1.2m and length of 1.2m. The top surface has an emissivity…

A:

Q: A certain material has a thickness of 4 cm and its thermal conductivity is 0.04 W / m.oC. At a…

A: The heat flow rate at the given distances from the material is to be calculated.

Q: Solid sphere made from steel metal with 20 mm diameter and steel cylinder with diameter of 10 mm and…

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Q: Example 2.1 : Calculate the rate of heat loss through a wall of k = 0.70 W/(m K)] 5 m in length, 4 m…

A: Above problem is based on conductio.Conduction is an mode of heat transfer which is define as the…

Q: A hot isothermal surface is to be cooled by attaching an array of parallel, equally spaced vertical…

A:

Q: (1) An asbestos pad is rectangle in cross section, measuring 3 cm x 10 cm on a side at its small…

A: To determine the temperature at the center of the wire (Tmax) and the convective heat transfer…

Q: a wooden wall is being kept at a constant temperature on one end and has air blown on it on the…

A: A wooden wall is kept at a constant temperature on one end and air blow on it on the other end.

Q: A spherical object at 10 °C was taken into a bath at 60 °C. The core temperature-time values ​​of…

A: Answer: Initial temperature of the spherical object, T0 = 10°C = 283 K Bath temperature, T∞ = 60°C =…

Q: Q3) After a long time in service, a counterflow oil cooler is checked to ascertain if its…

A: To Find  The heat reduced due to fouling

Q: 5. . . ) In a manufacturing process, a long, coated plastic rod (p = 2200 kg/m³, c = 800 J/kg K, k…

A: The time it take to the surface of the rod to reach 175o C, the temperature above which the special…

Q: A horizontal tube (inner and outside diameters are 2.0 cm and 2.5 cm respectively). is used as…

A: Given, 1Uinner=0.005 (m2–K)/W 1Uoutside=0.008 (m2–K)/W  1Uoverall=1Uinner+1Uoutside…

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: The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe…

A:

Q: 1. An experimental engine has a quartz window in the cylinder head that is 2.5 cm thick. During…

A: The heat transfer process is a process in which the molecules are moved from the region of higher…

Q: The walls of the refrigerated storage room are 10 m long and 3 m high and constructed with 100 mm (k…

A: Given: Area of refrigerated room = 10m×3m= 30 m2       T1 = -10 oC       T2 = 30 oC       hi = 10 W…

Q: Fourier's Law represents conduction. Which of the following DOES NOT represent a form of Fourier's…

A: Hello Subscriber! There are multiple questions posted. As per our policy, we have solved the first…

Q: The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe…

A: Heat transfer takes place from a steel pipe through conduction and convection.

Q: Q/ The heat transfer rate q over a surface is given by dT 9 = -KA= dy where k = thermal conductivity…

A: Given  K = 0.0125 J/ s .m. k Area  A = 2.5 m2 At y = 1.5

Q: Evaluate the statement whether it is true or false: For finding the viscosity of liquids, it is…

A: Given: For finding the viscosity of liquids, it is important to calibrate the viscometer using an…

Q: Q5) A cube of aluminum 10 cm on each side is initially at a temperature of 300 °C and is immersed in…

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Q: Verify that thermal conductivity

A:

Q: If a beaker of water is placed in a bell jar, and the water is maintained at constant temperature…

A: Introduction A bell jar is a glass jar, similar in shape to a bell , often used in laboratories to…

Q: Find the two-dimensional temperature distribution T(tz) under steady state condition. Where, To-20…

A: T0 = 20 C = 293 K T(L) = 1000 C = 1273 K Density (p) = 800 kg/m^3 k = 200 W / m K Cp = 2500 J/ kg K…

Q: The rate of heat transfers through a wall of thickness 20 cm having k = 5 W/m K, inner surface…

A: Given: L = 20cm = 0.2m A = 1m2 T1 = 60oC T2 = 30oC k = 5W/mk

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: A 3-inch Sched 40 steel pipe has a thermal conductivity of k = 15 W/m ° C covered with a 2.5 cm…

A: Given data: Dimension of pipe = 3 in schedule 40 kpipe = 15 W/m.0C Thickness of insulating material…

Q: A piston-cylinder assembly has 1 kg of air at 700 kPa and 400C. The piston cross-sectional area is…

A: This problem is based on the concept of ideal gas law. The data given : Initial temperature ,T1 =…