A procedure for determining the thermal conductivity of a solid material involves embedding a thermocouple in a very thick slab of the solid and measuring the response to a prescribed temperature change at one surface. Consider an arrangement for which the thermocouple is embedded 10 mm from a surface that is suddenly brought to a temperature of 100°C by exposure to boiling water. If the initial temperature of the solid was 30°C and the thermocouple measures a temperature of 65°C two minutes after the surface is brought to 100°C, determine the thermal conductivity. How much heat per unit area (J/m?) is added to the solid during the two minutes? The density p and heat capacity C,of the material are known to be 2200 kg/m³ and 700 J/kg·K. p

Q: Steel pipe (outer diameter 100 mm) is covered with two layers of insulation. The inner layer, 40 mm…

A:

Q: 30°C

A:

Q: Steel pipe 1 cm thick, 1.0 m long and 5 cm deep, covered with 2 cm thick insulation. The wall…

A:

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. Heat is transferred steadily in one direction in a composite plane wall that is made of two…

A: The objective of this question is to determine the rate of heat transfer in the system and the…

Q: Steam at 140 ° C flows in a pipe having an inner radius of 45 mm and an outer radius of 55 mm. The…

A: The rate of heat transfer through a pipe is calculated as, Q=Ti-To1Aihi+ln(ro/ri)2πkwL+1Aoho Where,…

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: 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: A round tube (ID = 60mm, OD = 80mm) carrying liquid ammonia has a constant surface temperature of…

A: Given, Density of air, ρ = 1.225 kg/m3 Inner diameter of the insulation, D = 80 mm +2×8 mm= 96×1…

Q: A 5 cm thick steel pipe, 1.0 m long, with an internal diameter of 8 cm is covered with 4 cm thick…

A:

Q: Steel pipe 3 cm thick, 1.0 m long and 10 cm deep, covered with 6 cm thick insulation. The wall…

A: Given data: Thickness of steel pipe = 3 cm Length of pipe = 1 m Depth of pipe= 10 cm Thickness of…

Q: A rubber insulated copper wire 2 mm diameter is carrying electric current and exposed to a uniform…

A: Given: The diameter of pipe is d = 2 mm = 0.002 m Insulation thickness t = 1 mm = 0.001 m, Consider…