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Do all incandescent solids obey the fourth power law of temperature?
Wiki User
∙ 13y ago
Yes, in principle, but only if their emissivity is independent of temperature. Generally, emissivity is a very weak function of temperature.
Wiki User
∙ 13y ago
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At what speed does heat radiation travel?
Heat transfer rate in radiation is proportional to the fourth power of the temperature difference
A signal travels through a transmission medium and its power is reduces to one fourth find attenuation?
We have to read the question carefully to be sure of the final powerafter it's reduced.If the question had said "reduces one fourth" or "reduces by one fourth",then the final power would have been 3/4 of the initial power.But the question says "reduces to one fourth", which says that thefinal power is 1/4 of the initial power.Attenuation = 10 log [ (final power)/(initial power)] = 10 log ( 1/4 ) = -6.02 dB
Which lamp has maximum efficiency?
In the home, LEDs have the highest efficiency, using 10-15% of the power of an incandesecent bulb of the same brightness. A CFL bulb uses 20-25% of the power of an incandescent, while a halogen uses about 70%.
May you have 20 examples of radiation heat?
Any object with a temperature above absolute zero - in other words, basically any object - will radiate heat. The amount of heat radiated is roughly proportional to the fourth power of the absolute temperature. Listing examples is rather boring; just think of any object. A person, a house, planet Earth, the Sun, a tree, etc.
How are led lights energy efficient?
Switching to LED lighting can save 40 to 70 per cent of electricity and these lighting can be used successfully in parking lots, common areas of apartment and even in your apartment. A building's carbon footprint from lighting can be reduced by 60 to 70 per cent by exchanging all incandescent bulbs for new LED. http://www.reddit.com/r/reddit.com/comments/asse9/led_lights_to_save_electricity_for_your_apartment/
The wavelength of the radiation emitted by a body depends upon?
Temperature and emissivity of the body.
What is the approximative power factor of an incandescent lamp?
Incandescent lamps are nearly pure resistive loads with a power factor of 1
What is 2 to the fourth power times 5 to the fourth power?
Two to the fourth power times 5 to the fourth power equals 10,000
At what speed does heat radiation travel?
Heat transfer rate in radiation is proportional to the fourth power of the temperature difference
What is 200 to the fourth power?
The answer to 200 to the fourth power is 1,600,000,000
What is 0.75 to the fourth power?
0.75 to the fourth power is 0.31640625
Is (-3b) to the fourth power equal to -12b to the fourth power?
No, it is not.
What is 3 to the fourth power?
3 to the fourth power=81Three to the fourth power is 81.
What is the most economical incandescent bulb 10 watts or fluorescent lamp 10 watts and why?
the most economical is the incandescent bulb because the power of bulb is low only while the fluorescent lamp is low and additional the power of ballast from 10%-20% power consumed.but the fluorescent lamp is 5 times brightly the incandescent bulb.
What is 0.6 to the fourth power?
0.6 to the fourth power equals 0.1296
What is M to the fourth power Times n to the fourth power?
m4n4
What is 3 raise to the fourth power?
-3 to the fourth power = 81
