A 3 m2 hot black surface at 80 C is losing heat to the surrounding air at 25 C by convection with a convection heat coefficient of 12 W/m2.C and by radiation to the surrounding surfaces at 15 C. Calculate the total rate of heat loss from the surface in watts.

Q: 42 oC with convection heat transfer coefficient of 9.0 W/m2 K. Solar radiation incident on the…

A: given:T0=45CT∞=42C h=9w/m2kthickness l=25cm

Q: 41.394 kg per second of water at 0.03398675 kbarg and internal energy of 15000 kW is heated at…

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Q: Required Information Consider a person whose exposed surface area is 2.1 m, emissivity is 0.5, and…

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Q: Which is higher for gases, specific heat in constant volume or specific heat in constant pressure?…

A: Specific heat at constant pressure is greater than specific heat at constant volume.CP>CV

Q: A 25-kg iron ball with a temperature of 95°C is placed in a container with water whose mass is 40…

A: Given data, Mass of the iron ball, miron = 25 kg Initial temperature of the iron ball, Tiiron=95 °C…

Q: the amount of energy required in BTU to heat the air in a 10'Fhoune ase the temperature by 70F at…

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Q: A fluid enters a machine at 187.91 m/s, 792 kPa, and with a specific volume of 0.111 m³/kg. The…

A: For solution refer below images.

Q: A student living in a 4-m x 6-m x 6-m dormitory room turns his 150-W fan on before she leaves her…

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Q: A 1.5m-long, 0.45-cm-diameter electrical wire extends across a room at 61°F, as shown. Heat is…

A: Given data: T1=61°F=16.22°CT2=306°F=152.22°Cd=0.45 cm=0.0045 mL=1.5 mV=70 VI=1.73 A Need to…

Q: Assume the price of coal is 0.04 $/kp and that this coal has a heat of combustion of 28 MJ /kg. What…

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Q: An aluminum plate, with dimensions of 3 cm × 3 cm × 5 cm (length, width, and thickness,…

A: Given:Volume,V=3*3*5 =45 cm3q=150 J/sρ=2700 Kg/m3t=10 secmass 0f aluminium plate,m=2700*45*10-6…

Q: An object of mass 2.0 kg has a velocity of (i -4 + j3 ) m/s. A force acts upon it and does 28 Nm of…

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Q: On a summer day, in Phoenix, Arizona, the inside room temperature is maintained at 20° C while the…

A: Given data as per question Inside temperature =200cOutside air temperature=43.30c

Q: The work done during the expansion of a gas is 5.31 kJ. The relationship between the pressure and…

A: The work done for the given expansion process can be given as following - Work done =…

Q: What do you mean by Natural greenhouse effect and Man made greenhouse effect? Which one is better…

A: The greenhouse effect could be a common prepare that warms the Earth's surface. When the Sun's…

Q: Five kg of air absorbs 50 Joules of heat at constant volume. During this process, the temperature…

A: According to First law of Thermodynamics(also known as Energy Conservation law or Joule's law or…

Q: A 5-cm-external-diameter, 10-m-long hot water pipe at 80°C is losing heat to the surrounding air at…

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Q: A circuit board houses on its surface 120 closely spaced logic chips, each dissipating 0.12 W. If…

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Q: A 20lbm object is located 300 ft above the ground. What is the potential energy of the object in…

A: Potential energy is product of Mass, acceleration due to gravity and height. PE = 1944.986 cal (In…

Q: Water, with a mass of 285 21.62°C, is heated at con The water is completely w Calculate the heat…

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Q: Consider two identical 80-kg men who are eating identical meals and doing identical things except…

A: Given, Weight of Men = 80 kg time of jogging(t) = 30 mins  The average weight of 68 kg…

Q: Is the internal energy of a solid likely to be independent of its volume, as is the case for an…

A: Yes, the internal energy of a solid is independent of its volume.

Q: The roof of a building is well insulated on its lower surface and the upper surface is made of black…

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Q: The outside surface of a satellite with an emissivity of 0.90 receives a solar radiant flux of 1260…

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Q: A classroom that normally contains 40 people is tobe air-conditioned with window air-conditioning…

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Q: A 2.5 lbm of a gas and receives heat at constant pressure of 55 psia. The internal energy increases…

A: Given data m=2.5 lbm∆U=240 BTU∆T=120°FW=120 BTU

Q: A body whose surface area is 0.65 m2 and the temperature is 175ºC is placed in a large chamber whose…

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Q: 2–105 The outer surface of a spacecraft in space has an emis- sivity of 0.6 and an absorptivity of…

A: Given      Emissivity = 0.6   Radiation, Q  = 1000 W/m2 Find    Surface temperature, T

Q: Do you feel comfortable in a room that has dry bulb temperature of 20 C and a wet bulb temperature…

A: Dry Bulb Temperature(DBT):  It is the temperature of moist air measured by ordinary thermometer. Wet…

Q: . Consider a person standing in a room at 25°C. Determine the total rate of heat transfer and the…

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Q: A fluid enters a machine at 182.39 m/s, 804 kPa, and with a specific volume of 0.206 m3/kg. The…

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Q: * A vertical piston-cylinder device contains water and is being heated on top of a range. During the…

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Q: A room contains moist air with a dry-bulb temperature of 250C and a wet-bulb temperature 210C.…

A: Given:Dry bulb temperature, Tdbt=25o CWet bulb temperture, Twbt=21o C

Q: Calculate the quantity of heat to be transferred in BTU to 4.17 kg of brass to raise its temperature…

A: Handwriting.jpg

Q: Calculate the quantity of heat to be transferred in BTU to 2.81 kg of brass to raise its temperature…

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Q: Calculate the amount of energy required in BTU to heat the air in a house 30 by 50 by 40 ft from 10…

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Q: A 10-cm diameter copper ball is to be heated from 90°C to an average temperature of 160°C in 30…

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