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Need help #46&47 please show work step by step thanks.
wood. 46. The average temperature of...
2. The average person has 1.4 m2 of skin at a skin temperature of roughly 305...
2. The average person has 1.4 m2 of skin at a skin temperature of roughly 305 K (90°F) Consider the average person to be an ideal radiator standing in a room at a temperature of 293 K (68°F) (a) Calculate the power (energy per uni i) radiated by the average person in the form of blackbody radiation; express your answer in erg s-1. What is the person's "wattage"? (1 W = 107 erg s-1) Compare this to a typical incandescent...
Part A please thanks! The skin temperature of a nude person is 32.5°C and the surroundings...
Part A please thanks!
The skin temperature of a nude person is 32.5°C and the surroundings are at 21.0°C. The emissivity of skin is 0.910, and the surface area of the person is 1.50 m². What is the rate P at which energy radiates from the person? P = 507 What is the net energy loss AE from the body in 1 min by radiation? AE = 5755.2
RACTICE IT se the worked example above to help you solve this problem. Assume that the...
RACTICE IT se the worked example above to help you solve this problem. Assume that the Sun delivers an average power per unit area of about 1000 W/m2 to Earth's surface. (a) Calculate the total power incident on a flat tin roof 7.66 m by 23.4 m. Assume that the radiation is incident nomal (perpendicular) to the roof 179244 (b) The tin roof reflects some light, and convection, conduction and radiation transport the rest of the thermal energy away, until...
Please show your work step by step and make sure the answers are correct because I...
Please show your work step by step and make sure the answers
are correct because I have no chance to reanswer for this
question
What is the temperature at the plane where the wood meets the Styrofoam? Express your answer using two significant figures Constants A carpenter builds an exterior house wall with a layer of wood 3.2 cm thick on the outside and a layer of Styrofoam insulation 2.4 cm thick on the inside wall surface. The wood has...
Please help with this Mechanical Engineering Heat Transfer Problem. Please show all work! Thanks 4. Consider...
Please help with this Mechanical Engineering Heat Transfer
Problem. Please show all work! Thanks
4. Consider steady radial conduction in a long pipe (k = 1 W/m°C) with an inner radius of 5 cm and an outer radius of 10 cm. The inner surface of the pipe is maintained at 100°C while the outer surface is maintained at 50°C. Determine the following: ii) iii) iv) the rate heat transfer per unit length (W/m) the heat flux (W/m²) at the inner...
Hi I need help with both questions for an upcoming test. Please help! Thanks for the...
Hi I need help with both questions for an upcoming test. Please
help! Thanks for the help!
2. Rutherford Scattering Protons are shot into a copper foil with d-12 μm. what is the proton energy if the central collisions minbecome equal to the nuclear radius r copper atoms? The derivation of the impact parameter with respect to deflection angle is obtained by assuming a Coulomb potential of the form F x 1/r2 (equation 4.12 in Haken-Wolf textbook). Derive the impact...
Need help with part B (the sketching!) thanks Problem 3: A thin flat plate of length...
Need help with part B (the sketching!) thanks
Problem 3: A thin flat plate of length L-120 mm, thickness t=4 mm, width W=30 mm, and thermal conductivity k=20 W/m-K is thermally joined to heat sinks at different temperatures, where T(x = 0) = To-100 C and T(x = L) = T,-35°C. The top surface of the plate is subjected to uniform heat flux q"-20 kW/m2, and the bottom surface of the plate is subjected to uniform convection with a convection...
Please help solve these parts. Thanks After leaving the furnace at temperature 900°C, steel balls of...
Please help solve these parts. Thanks
After leaving the furnace at temperature 900°C, steel balls of radius 1.5 cm are being placed in a moving belt of speed u=1 cm/s and cooled slowly in air (Too = 30°C, h = 100 W/m²K); these balls are then collected Furnace Air, 35°C after moving a distance of L = 4.5 m. Choose steel: ks = 900°C 50 = 0.465 kg.K Air: ka = 0.025 Pa = 1.2800 kg,ca = 0.718 k] The...
Physics problem I need help with! The average temperature of the surface of the Earth is...
Physics problem I need help with!
The average temperature of the surface of the Earth is
approximately 14°C. What would the steady-state
temperature of the Earth be if there were no greenhouse effect —
i.e. if the emissivity of the earth was independent of wavelength?
Provide answer in °C. Note that the radius of the
Earth is 6.38×10^6 m, and the intensity of sunlight at the Earth’s
location is 1366 W/m^2. (Hint, how much power from the sun would
strike...
Could someone help me with this question please as I am kinda lost as in how to do these type of questions please explain each step a) Draw a diagram of a solar hot water system and discuss the funct...
Could someone help me with this question please as I am kinda
lost as in how to do these type of questions
please explain each step
a) Draw a diagram of a solar hot water system and discuss the functions of its [5 marks For the solar collector, analyse the solar radiation heat gain and heat losses through different modes of heat transfer. How is the heat transfer rate to the water per unit area of the collector calculated? b)...
2. The average person has 1.4 m2 of skin at a skin temperature of roughly 305 K (90°F) Consider the average person to be an ideal radiator standing in a room at a temperature of 293 K (68°F) (a) Calculate the power (energy per uni i) radiated by the average person in the form of blackbody radiation; express your answer in erg s-1. What is the person's "wattage"? (1 W = 107 erg s-1) Compare this to a typical incandescent...
Part A please thanks!
The skin temperature of a nude person is 32.5°C and the surroundings are at 21.0°C. The emissivity of skin is 0.910, and the surface area of the person is 1.50 m². What is the rate P at which energy radiates from the person? P = 507 What is the net energy loss AE from the body in 1 min by radiation? AE = 5755.2
RACTICE IT se the worked example above to help you solve this problem. Assume that the Sun delivers an average power per unit area of about 1000 W/m2 to Earth's surface. (a) Calculate the total power incident on a flat tin roof 7.66 m by 23.4 m. Assume that the radiation is incident nomal (perpendicular) to the roof 179244 (b) The tin roof reflects some light, and convection, conduction and radiation transport the rest of the thermal energy away, until...
Please show your work step by step and make sure the answers
are correct because I have no chance to reanswer for this
question
What is the temperature at the plane where the wood meets the Styrofoam? Express your answer using two significant figures Constants A carpenter builds an exterior house wall with a layer of wood 3.2 cm thick on the outside and a layer of Styrofoam insulation 2.4 cm thick on the inside wall surface. The wood has...
Please help with this Mechanical Engineering Heat Transfer
Problem. Please show all work! Thanks
4. Consider steady radial conduction in a long pipe (k = 1 W/m°C) with an inner radius of 5 cm and an outer radius of 10 cm. The inner surface of the pipe is maintained at 100°C while the outer surface is maintained at 50°C. Determine the following: ii) iii) iv) the rate heat transfer per unit length (W/m) the heat flux (W/m²) at the inner...
Hi I need help with both questions for an upcoming test. Please
help! Thanks for the help!
2. Rutherford Scattering Protons are shot into a copper foil with d-12 μm. what is the proton energy if the central collisions minbecome equal to the nuclear radius r copper atoms? The derivation of the impact parameter with respect to deflection angle is obtained by assuming a Coulomb potential of the form F x 1/r2 (equation 4.12 in Haken-Wolf textbook). Derive the impact...
Need help with part B (the sketching!) thanks
Problem 3: A thin flat plate of length L-120 mm, thickness t=4 mm, width W=30 mm, and thermal conductivity k=20 W/m-K is thermally joined to heat sinks at different temperatures, where T(x = 0) = To-100 C and T(x = L) = T,-35°C. The top surface of the plate is subjected to uniform heat flux q"-20 kW/m2, and the bottom surface of the plate is subjected to uniform convection with a convection...
Please help solve these parts. Thanks
After leaving the furnace at temperature 900°C, steel balls of radius 1.5 cm are being placed in a moving belt of speed u=1 cm/s and cooled slowly in air (Too = 30°C, h = 100 W/m²K); these balls are then collected Furnace Air, 35°C after moving a distance of L = 4.5 m. Choose steel: ks = 900°C 50 = 0.465 kg.K Air: ka = 0.025 Pa = 1.2800 kg,ca = 0.718 k] The...
Physics problem I need help with!
The average temperature of the surface of the Earth is
approximately 14°C. What would the steady-state
temperature of the Earth be if there were no greenhouse effect —
i.e. if the emissivity of the earth was independent of wavelength?
Provide answer in °C. Note that the radius of the
Earth is 6.38×10^6 m, and the intensity of sunlight at the Earth’s
location is 1366 W/m^2. (Hint, how much power from the sun would
strike...
Could someone help me with this question please as I am kinda
lost as in how to do these type of questions
please explain each step
a) Draw a diagram of a solar hot water system and discuss the functions of its [5 marks For the solar collector, analyse the solar radiation heat gain and heat losses through different modes of heat transfer. How is the heat transfer rate to the water per unit area of the collector calculated? b)...
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