A 20-cm diameter copper ball is to be heated from 110°C to an average temperature of 170°C in 90 minutes. Taking the average density and specific heat of copper in this temperature range to be p=8950 kg/m and Cp=0.395 kJ/kg . °C, respectively, determine the average heat flux in W/m? (Area of sphere: TD?; Volume of sphere=TD/6)? A 410 B 41.0 1305.0 130.5

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: 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: 1-65 An aluminum pan whose thermal conductivity is 237 W/m °C has a flat bottom with diameter 20 cm…

A: given = Q = 800 W d = 20 cm = 20*10-2 m2 L = 0.4 cm = 0.4*10-2 m2 wkt Q = KA(T1-T2)L

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 long circular cylinder is encased and centered in a long square cylinder of concrete (k 1.2 W/m·K)…

A: Given , Thermal conductivity,k=1.2W/mKTemperature of cylinder,T1=200°C=473KTemperature of…

Q: What does this graph show?

A: This question is based on data analysis.

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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: Q4) Consider a 20-cm-thick large concrete plane wall (k = 27°C and h1 = 5 W/m². 12 W/m² °C on the…

A: Given Data The thickness of concrete = 20 cm = 0.2 m Thermal Conductivity of concrete (k) = 0.77…

Q: Problem 2. In cement production the intermediate product which leaves the cement kiln is called…

A: Given that T∞=25 CTi=300 Ch =200 wm2kk=2 wmkTf =50 C

Q: Saturated steam at 267°F is flowing inside a hollow sphere with an ID of 0.824 in. and an OD of 1.05…

A: Refer to the figure shown below based on the given problem statement,

Q: A food product with 73% moisture content in a 5 cm diameter can wants to be frozen. The density of…

A: Given data: Density of the product = 970 kg/m3 Thermal conductivity of the product = 1.2 W/m∙K…

Q: One side of a copper block 5 cm thick is maintained at 250°C. The other side is covered with a layer…

A:

Q: The cylinder is made from aluminum with diameter and thickness of 5 cm and 1 cm respectively. The…

A: Given data: Diameter of cylinder = 5 cm Thickness of cylinder = 1 cm Wall temperature in the inside…

Q: A certain material 2.5 cm thick, with a cross-sectional area of 0.1 m², has one side maintained at…

A: Given,