A 5-cm-external-diameter, 10-m-long hot-water pipe at 80°C is losing heat to the surrounding air at 5°C by natural convection with a heat transfer coefficient of 25W/m2K. Determine the rate of heat loss from the pipe by natural convection.

Q: For the outside walls of a home, two layers are often combined, such as a layer of wood and a layer…

A: Given,

Q: a) A house walls that are 14 cm thick and have an average thermal conductivity four times that of…

A: The rate of heat conduction transfer that can take place through the material is given as,…

Q: a) A house walls that are 13 cm thick and have an average thermal conductivity four times that of…

A: Given: Distance between the walls, d = 0.13 m. Thermal conductivity of the material, k = 4 x kgw = 4…

Q: Thermography is a technique for measuring radiant heat and detecting variations in surface…

A:

Q: You are eating a bowl of soup at 85 degC. The soup bowl has a diameter of 6.0 inches and the air…

A:

Q: In 2 room where walls are at 25 degree C, a steam pipe with a surface temperature of 200 degree C,…

A: Given   Wall temperature T∞     = 25° + 273 = 298 KSurface temperature Ts = 200° + 273 = 473…

Q: a) A house walls that are 16 cm thick and have an average thermal conductivity three times that of…

A:

Q: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled…

A: The expression for the required rate of heat transfer is,

Q: You are eating a bowl of soup at 85 degC. The soup bowl has a diameter of 6.0 inches and the air…

A: Temperature of bowlTb=85 oC=85+273 K=358 KTemperature of air above the bowlTa=21 oC=21+273…

Q: A person sits in a room with surrounding air at 26°C and convection coefficient over the body…

A: Given data. Here, h is convection coefficient. A is the surface area of the body. When the  person…

Q: in a living room a person has a temperature of 35C .If the room. temperature is 30C what is the body…

A:

Q: A2.1-m-long, 0.2-cm-diameter electrical wire extends across a room that is maintained at 20°C. Heat…

A: When an electric current is passed through a conductor due to the resistance heat is generated. The…

Q: 7. Dr. Frankstein got an assignment of measuring the convection heat transfer coefficient of a blade…

A: Given: The temperature of the surroundings of the blade is 500oC The diameter of the blade is 1.2 m…

Q: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled…

A: Heat transfer is given by,  Q=mS∆T Here,  m is mass and S is specific heat of blood and ∆T is change…

Q: 4. The initial heat profile of a zero border rod of length L = 2 m is u(x,0). The equation modelling…

A: Solution:   As per the above data,

Q: A 2m² large and 1 cm thick door made of steel insulates a room against its surrounding. The…

A: Solution:-Given thatArea of door (A)=2 m2Thickness (L1)=1 cm=0.01 mInside temperature…

Q: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled…

A:

Q: Example: A building has a south-facing thermal storage wall with night insulation of Rins equal to…

A: From the given data, the coefficient Uk can be calculated as follows, Uk=1wk+1hi=10.422+18.3=3.026…

Q: BIO Basal Metabolic Rate. The basal metabolic rate is the rate at which energy is produced in the…

A: We have to calculate the net amount of heat radiate per second by the person. We know that a human…

Q: While jogging, a 70.0-kgkg student generates thermal energy at a rate of 1200 WW. To maintain a…

A: While jogging, a 70.0-kgkg student generates thermal energy at a rate of 1200 WW. To maintain a…

Q: a) A house walls that are 14 cm thick and have an average thermal conductivity four times that of…

A: Given, Thickness of wall  d = 14 cm = 0.14 m Surface area of wall A = 1200000 cm2 = 120 m2…

Q: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled…

A:

Q: Number 3 A food product with 73% moisture content in a 5 cm diameter can wants to be frozen. The…

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

Q: Two different materials (A and B) are being considered as insulation for a winter coat. Material A…

A: Heat conduction.

Q: A naked patient undergoes surgery in a warm room. Determine the ratio Pc /Pe, where Pc is the…

A:

Q: a) A house walls that are 12 cm thick and have an average thermal conductivity two times that of…

A:

Q: 3. The following data is related to a short brass cylinder of diameter D 10 cm and height H = 20 cm…

A: First of all we are having the properties of Brass at room temprature: k=110 W/m0C, density=8530…

Q: B- Calculate the heat flow through a surface of 2500 cm? of mineral wool insulation, with 7 cm…

A: Heat flow is given by where,

Q: Assume that geothermal heat transfer (at least near the surface of the earth) is by conduction…

A: Given:Average geothermal heat flow,P/A= 0.087 W/m2Thermal gradient ,∆TL=100 °C/kmFind the thermal…

Q: Suppose you want to raise the temperature of a 0.18-kg piece of ice from -20.0°C to 130°C. The heat…

A:

Q: A circular pipe of OD 20 cm is enclosed centrally in a square section insulation of 36 cm side. The…

A: Given-Outer Diameter= 20cm or 0.2mSide of square section=36cm or 0.36mThermal Conductivity (K)…

Q: 1. A cylindrical aluminum rod is positioned between two enclosed volumes, each con- taining x moles…

A: Given that: Length of the rod, L=24.0 cm=0.24 mArea of cross section, A=14.0 cm2=14.0×10-4…