A copper sphere of 1.01 m diameter is coated with lamp black and maintained at a temperature of 513°K. How much energy is radiated in two minutes ? (Stefan's constant 5.7 x 10-8 J/m² k² s)

Q: A spherical body of area A and emissivity e=0.5 is kept inside a perfectly black body. Energy…

A: According to Stephan's Boltzman law, P=σAT4 ; for black body P = σeAT4; for any other body

Q: (1a). Figure shows a copper rod AB being heated at one end. Explain how the heat transfers from A to…

A: we consider earth as a black body  so we will evaluate heat emitted by black body at temprature T .

Q: What amount of energy is required to change a spherical drop of water with a diameter of 1.60Mm to…

A: The problem states that we need to calculate the amount of energy required to change a spherical…

Q: The total power of the radiation emitted by the body is W. b. Suppose thir blaclch

A: Given,  Radius, R = 4.5 cm = 0.045 m  T = 293 K  Now,  According to the Steffen Boltzmann law, the…

Q: If the Kelvin temperature of a spherical object were increased by 20%, by approximately what factor…

A: Using Stefan-Boltzmann law, rate of radiated energy is, Qt=σeAT4

Q: A star radiates 3.75 times less power than the Sun. What is the ratio of the temperature of the star…

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Q: What is the percent increase in the energy radiated by a person with a average body temperature of…

A: Given : Normal temperature of person, T1 = 37oC = 273 + 37 = 310 K Temperature rises to, T2 = 40oC =…

Q: Consider a black body of surface area 20.0 cm² and temperature 5 000 K. How much power does it…

A: Stefan's Boltzmann law describes the power radiated from a blackbody from its temperature. It states…

Q: The operating temperature of a tungsten filament in an incandescent light bulb is 2500 KK, and its…

A: Given that:-Temperature, T=2500KEmissivity, e=0.350Power, P=200 WattStefan consatnt, σ=5.67×10-8…

Q: A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were…

A: We are aware that a black body with a radius of 12 cm and a temperature of 500 K emits 450 W of…

Q: 24. Radiation. Find steady-state temperatures in the rectangle in Fig. 296 with the upper and left…

A: Steady state thermal analysis of rectangular fin, and a specified base temperature condition.…

Q: Consider a surface at a uniform temperature of 800 K. Determine the maximum rate of thermal…

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Q: A spherical surface of area 0.5m2, emissivity 0.85 and temperature 132°C is placed in a large,…

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Q: Given that the temperature at the surface of the sun is 5800 K and assuming the sun to be a…

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Q: Proxima Centauri, the nearest star to our sun, has a surface temperature of 3040 K. Find (a) the…

A: A perfect black body absorbs all the radiation incidents on it whereas a white body reflects all the…

Q: The specific heat of copper is 385J/Kg/K. How much energy in Joules is need to heat up a 0.4 kg of…

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Q: The power radiated per square centimeters * from skin at a temperature of 20°C is 0.041 watt per…

A: Area (A) = 1 cm2= 0.0001 m2Temperature of skin (T) = 20oC = 293 kelvin

Q: A white star that has a surface temperature (in kelvins) that is four times that of our sun the…

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Q: Suppose you have a sphere with a surface area of about 1.3 m2. If the temperature of the sphere were…

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Q: A large cavity that has a very small hole and is maintained at a temperature T is a good…

A: temperature (T) = 400oC = 400+ 273 k = 673 k Area (A) = 6 mm2= 6×10-6 m2Energy (E) = 300 J

Q: A star has a power output of 2.5 x 1026 W and a radius of 8.92 x 108 m. Calculate the surface…

A: A black body is an ideal body that is capable of absorbing all the radiation that falls on it. For…

Q: Find amount of heat removed from skin surface for each liter of sweat that evaporates from theskin.…

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Q: The specific heat of iron is 412J/Kg/K. How much energy in Joules is need to heat up a 0.2 kg of…

A: The energy required to raise the temperature of a substance of mass 'm' is given by the following…

Q: In a foundry molten metal is stored in a large insulated crucible at 1800oC. To retain heat the…

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Q: A spherical blackbody of 5 cm in radius is in equilibrium with its surroundings. It then absorbs 50…

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Q: Calculate the amount of radiation emitted for a unit surface (1 m2) for a white ball at 53°C and…

A: Given data, Surface Area (A)=1 m2 Temperature (T)=530C Emissivity (ε)=0.12

Q: Fused quartz transmits 90 percent of the incident thermal radiation between 0.2 and 4 µm. Suppose a…

A: As part of our policy, we have answered first 3 subparts of the question. Being it a lengthy…

Q: The Sun has a diameter of approximately 1.4 x 109 m and a surface temperature of about 5650 C.…

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Q: A cylindrical surface of radius 57 cm and length 1.2 m maintained at a temperature of 142°C is…

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Q: The radiation energy (intensity of the radiation) reaching Earth from the sun at the top of the…

A: Assume R to be the radius of the Earth. The total energy E absorbed by the Earth due to the solar…

Q: The temperature of a kitchen oven may be 420 °F., Suppose a small circular hole, with diameter d = 1…

A: Temperature of kitchen oven T = 420 FDiameter d=1cm

Q: A sample of metal at a temperature of 23 oC has a weight of 32.5N. When energy of 1.7x10^4  is…

A: The specific heat is in terms of specific heat constant, mass, and temperature difference. Q=m…