An incandescent light bulb with a surface area of 0.0137 m2 and an emissivity of 0.93 has a surface temperature of 178°C. What is the rate of thermal radiation emitted from the bulb [round your final answer to one decimal place]? {σ = 5.6704 x 10-8 W/(m2∙K4)}

23.0 g of copper pellets are removed from a 300 degree C oven and immediately dropped into 100 ml of water at 25 degree C in an insulated cup . what will the new water temperature be? express answer in degree C

An incandescent light bulb with a surface area of 0.0120 m2 and an emissivity of 0.9 has a surface temperature of 178°C. What is the rate of thermal radiation emitted from the bulb [round your final answer to one decimal place]? {o = 5.6704 x 10-8 W/(m²-K“)} 60 W T.

13. Solve

9. 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)

14. The sun's temperature decreases steadily as the distance from its innermost regions increases. The sole exception to this is in the outermost part of the sun's atmosphere. This region, called the corona, consists of thin gases that are heated by the sun's magnetic field. As a result, the corona has an average temperature of about 1.0 x 10° K. What is this temperature in degrees Celsius? Must give answer then also | give answer in significant fig format