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A 158 cm long aluminum rod (thermal conductivity = 205 W/m-K) has a cross-section area of 1 cm2. If one end is kept in a steam bath and the other end in an ice-water mixture, what is the quantity of heat (in Joules)
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- A 755-g sample of water is heated from 5.50°C to 98.40 °C. Calculate the amount of heat absorbed (in kilojoules) by the water. Specific heat of water = 4.184 J/g-°C . Your answer must be 4 sig figure and in kJSuppose a human body's core internal temperature is 37.0°C, the skin temperature is 34.0°C, the thickness of the tissues between averages 0.85 cm, and the surface area is 1.42 m2. Calculate the rate of heat conduction, in watts, out of the human body.Numeric : A numeric value is expected and not an expression.Q/Δt = __________________________________________Heat flows through a pipe wall, with a radius in Ri and outer radius Ro. The length of the pipe is L. The thermal conductivity of the pipe material is proportional to the temperature squared in the form: k=aT²+b a. Derive the equation for the pipe wall temperature profile, b. Calculate the heat loss through the pipe wall.
- A hot steel plate with a surface area of 1.52 m2 and a constant surface temperature of 166°C is exposed to ambient air at 22°C. If the convection heat transfer coefficient is 15.9 W/m². K, what is the rate of heat transfer (in W) from the plate to the air [round your final answer to zero decimal places]? T. S Air, T, 00An engineer who is working on the heat transfer analysis of a house in English units needs the convection heat transfer coefficient on the outer surface of the house. But the only value he can find from his handbooks is 22 W/m2·K, which is in SI units. The engineer does not have a direct conversion factor between the two unit systems for the convection heat transfer coefficient. Using the conversion factors between W and Btu/h, m and ft, and °C and °F, express the given convection heat transfer coefficient in Btu/h·ft2·°F.A 900 g copper rod at 20 degrees celcius has a length of 1.0000 m. The thermal expansion coefficient of copper is 17 x 10^-6 degrees celcius -1. The specific heat capacity is 0.385 kJ/kg degrees celcius. Question A: The copper is heated to 400 degrees celcius. What is the new length? Give the answer in meters and with 4 digits of precision after the decimal. Question B: The hot copper is then quenched by dunking the entire rod in a bucket with 10 kg of water at 20 degrees celcius. The specific heat capaciy of water is 4.18 kJ/kg degrees celcius. If none of the water turns to steam what is the equilibrium temp of the copper rod and water? Please give the answer in degrees celcius Question C: You measure the equilbrium temp and find that it is 24 degrees celcius. If the latent heat of vaporization of water is 2,260 kJ/kg, what mass of water turned to steam? Answer in grams
- A 142 cm long aluminum rod (thermal conductivity = 205 W/m-K) has a cross-section area of 3 cm2. If one end is kept in a steam bath and the other end in an ice-water mixture, what is the quantity of heat (in Joules) conducted by the rod in 1 days?A window has dimensions of 1.7 m by 2.75 m and is made of glass 5.5 mm thick. On a winter day, the outside temperature is 25° C while the inside temperature is a comfortable at 16° C. (k of glass =0.185W/m.K) Calculate the following (a): the area of the window in square metres : the temperature gradient (ΔT/Δx)in kelvin/metre : the rate of heat lost through the window by conduction in watts/metre.kelvin :An electronics device generates 30.5 W of heat energy during normal operation. The heat is dissipated from the top surface of the device to ambient air at 23°C. If the top surface area is 0.158 m2 and the convection heat transfer coefficient is 7.838 W/m2. K, what will be the surface temperature (in °C) of the device [round your final answer to one decimal place]? Air, T. T 00 S
- A Styrofoam box has a surface area of 0.9 m2 and a wall thickness of 1.8 cm. The temperature of the inner surface is 6.6°C, and the outside temperature is 24°C. If it takes 7.7 h for 8 kg of ice to melt in the container, determine the thermal conductivity of the Styrofoam. Final answer in three decimal places. For water, Lf = 334 000 J/ kg.What is the rate of heat transfer in J/s through the body's skin and the fat layer just beneath its surface? Treat the skin and fat as a single layer that is 1.20 cm thick. Assume the temperature of the inner surface of the layer corresponds to internal body temperature, or 36.7 °C, and the temperature of the outer surface of the layer corresponds to skin temperature, or 34.0 °C. Take the total surface area of the layer to be 1.50 m² and use a value of 0.413 W/(m-C°) for the average thermal conductivity of the layer. Number UnitsA picture window has dimensions of 1.25 m by 2.6 m and is made of glass 7.5 mm thick. On a winter day, the outside temperature is 22° C while the inside temperature is a comfortable at 19° C. (k of glass =0.075W/m.K) Calculate the following:a) the area of the window in square metres