Ex. 124 A body cools from 75° to 55°C in 10 minutes in a surrounding of 31°C. At what temperature will its rate of cooling be one fourth that at the beginning.
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![Ex. 124 A body cools from 75° to 55°C in
10 minutes in a surrounding of 31°C. At what
temperature will its rate of cooling be one
fourth that at the beginning.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd1f34929-48d3-4f41-8493-78c9f1ce11a3%2F2d46c8aa-9a90-4f6c-83c2-7fc23b27edde%2Fdrcalcp_processed.jpeg&w=3840&q=75)
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- Suppose that a planet with no atmosphere orbits a Sunlike star at the same radius as the Earth’s orbit and keeps the same face toward the sun at all times. The planet reflects 40% of the light falling on it, and the average temperature on the facing surface is nearly uniform and 185 K larger than the nearly uniform temperature on its back surface. What is the planet’s average temperature? The planet's average planetary temperature is _______ K.On a nice winter day at the South Pole, the temperature rises to -55°F. What is the approximate temperature in degrees Celsius? °℃ Need Help? Read ItAn iron rod with an initial length of 11.1 m has its temperature raised from 16o C to 30.35o C. If iron has a coefficient of thermal expansion of 12x10-6 1/oC, what is the change in length of the rod in mm?
- The exterior walls of a house have a total area of 194 m2 and are at 12.4°C and the surrounding air is at 7.4° C. Find the rate of convective cooling of the walls, assuming a convection coefficient of 2.9 W/(m2·°C). Since you're looking for the rate of cooling, your answer should be entered as positiveCalculate the rate of heat conduction through house walls that are 13.0 cm thick and that have an avera thermal conductivity of 0.027W/m°C. Assume there are no windows or doors. The surface area of the walle is 120m? and their inside surface is at 18.0°C, while their outside surface is at 5.00°c9. The conduction heat flux through a wall is known to be 2020 W/m² and the convection heat flux from the outer surface of the wall is 1650 W/m². It is also known that the temperature on the outer surface and the surrounding are 373 K and 298 K respectively. Find the emissivity, &, of the outer surface of the wall. = 5.67 x 10-8 W/m²K4) (o= (Ans: ε = 0.569)