what is the heat flux due to radiation across one square meter of fin surface area in a vehicle's aluminum radiator if it has a black anodized coating if the average coolant temperature is 112 degrees C ?

james investigated heat conduction in copper and plastic to find out which is a better insulator.He used Vaseline to stick a drawing pin to the of a bar made of copper and bar made of plastic.Each bar is 10cm long dameter of 1cm.James held the ends without the drawing pin over a Bunsen burner flame with a pair of tongs.He recored how long it took for each drawing pin to drop.  Which variable was measured and which instrument is suitable for measuring the variables you mentioned. Which variable was changed. Tell us how James could tell from his results which substance is the better insulator.

un The value of thermal conductivity_k depends upon the material through which the heat is transferred O the intensity of heat energy which is being transferred all of these. the area which is parallel to the heat transfer

If a blackbody is radiating at T=1330 K at what wavelength is the maximum intensity?

How much power is radiated from each panel? Assume that the panels are in the shade so that the absorbed radiation will be negligible. Assume that the emissivity of the panels is 1.0.

Radiation from a Craft in Space.A space satellite in the shape of a sphere is traveling in outer space, where its surface temperature is held at 283.2 K. The sphere "sees" only outer space, which can be considered as a black body with a temperature of 0 K. The polished surface of the sphere has an emissivity of 0.1. Calculate the heat loss per m2by radiation.

Q1: A 1.5mx0.8m double glass window consists of two glass(k=0.78 W/mC) layers with a 4 mm thickness for each layer, seperated by a 10 mm thick of still air gap. If the thermal cnductivity of still air is 0.026 W/mC, what is the rate of heat transfer through the window, if the temperatures of the inner and outer surfaces of the window are 15 and -8°C respectively. يتكون شباك ارتفاعه 0.8m وعرضه 1.5m من طبقتين من الز جـاج 0.78 k=( (°CW/m سمك كل واحدة منهما Am m ومفصولتين بطبقة هوائية سمكها 10mm . إذا كان معامل الانتقال بالتوصيل ل لهواء الساكن W/m °C 0.026 أحسب معدل انتقال الحرارة خلال الشباك إذا كانت درجة حرارة السطح الداخلي ل لشباك C° 15 ودرجة حرارة السطح الخارجي C° 8-. T2 T3 هواء Glass Air Glass Ax, A X, A X3

The intensity of solar radiation reaching Mars averages about 580 W/m2. a) Assuming the Sun radiates as a blackbody, estimate the surface temperature of the Sun. b) Assuming that Mars behaves like a blackbody, how much energy is absorbed per unit time. What is its equilibrium temperature if all this energy is re-radiated back into space?

Size of a Light-Bulb Filament. The operating temperature of a tungsten filament in an incandescent light bulb is 2450 K, and its emissivity is 0.350. Find the surface area of the filament of a 150 W bulb if all the electrical energy consumed by the bulb is radiated by the filament as electromagnetic waves.

An incandescent lamp filament, with a surface area of 100 mm2, operates at a temperature of 2300 0 Assume that the filament acts like a blackbody. What is the rate of radiation from the filament? If the walls of the room in which the lamp operates are at 27 0C, what is the rate at which the filament absorbs radiation? At what rate does electrical energy have to supplied tot eh filament to keep its temperature constant? Ignore conduction and convection losses from the filament