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Why the newtons law of cooling is not valid for high temperature?
Wiki User
∙ 10y ago
According to the Wikipedia article, a non-mathematical explanation of Newton's Law of Cooling is: "The rate of heat loss of a body is proportional to the temperature difference between the body and its surroundings."
In other words, it is assumed that the rate of heat loss will increase linearly with temperature. This is basically correct if you consider only conduction; however, in the case of radiation, the radiation emitted by a body is proportional to the fourth power of the absolute temperature (for example, temperature measured in Kelvin). This will give you a curve, not a straight line; for small temperature intervals, you can approximate this with a straight line, but it will not be exact.
Wiki User
∙ 10y ago
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Because of the second law of thermodynamics , law of entropy. "when energy flows from a high-temperature object to a low-temperature object, the source temperature is decreased while the sink temperature is increased; hence temperature differences tend to diminish over time."
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As i am a blade of grass myself i think you will find my answer is not only valid, but accurate. The average temperature of the environment me and my bretheren reside in is 7. no more, no less.
Does temperature does temperature affect viscosity of magma?
High temperature=low viscosityLow temperature=high viscosity
How is temperature affected if there is a high pressure in the atmosphere?
High pressure = High temperature
What is ZFC-FC?
Zero Field Cooling - Field Cooling Measuring an effect from a field in the two following ways: ZFC- Applying the field at a relatively low temperature compared to a characteristic temperature and continuously measuring the effects of the field as you raise the temperature to a level well above the characteristic level. FC - Applying the field at a relatively high temperature compared to a characteristic temperature and continuously measuring the effects of the field as you lower the temperature to a level well below the characteristic level. FC can be thought of as the reverse process to ZFC. If the effect you're measuring doesn't reverse using ZFC-FC, then you have something interesting on your hands.
What produces high temperature refrigeration?
an air conditioning system, is considered high-temperature refrigeration and is used for comfort cooling.
Is the boyles law is valid at high temperature?
Yes, if the pressure is low.
Is Boyle law valid at very high temperature?
Yes, if the pressure is low.
Why is newton law of cooling is not valid for high temperature?
According to the Wikipedia article, a non-mathematical explanation of Newton's Law of Cooling is: "The rate of heat loss of a body is proportional to the temperature difference between the body and its surroundings."In other words, it is assumed that the rate of heat loss will increase linearly with temperature. This is basically correct if you consider only conduction; however, in the case of radiation, the radiation emitted by a body is proportional to the fourth power of the absolute temperature (for example, temperature measured in Kelvin). This will give you a curve, not a straight line; for small temperature intervals, you can approximate this with a straight line, but it will not be exact.
Why does the temperature of an athlete reduce when he sweats?
Sweat is a natural cooling process that is released to cool your body from high temperatures
Why dodge stratus cooling fans working even after engine is shut down?
Cooling fans are controlled by the computer based on input from temperature sensor. After the vehicle is shut down, if the temperature is still high, the computer will turn on the fans to cool the engine.
Which system cooling equipment is best for a desktop that runs at high temperatures?
The system cooling equipment that is best for a desktop computer that runs on high temperatures would be one that equally distributes the cool air as to maintain the temperature and the performance of the desktop .
Why metamorphic rock will form neither synthetically nor naturally if the temperature is too high?
By too high, are you referring to a temperature high enough to melt the parent rock? If so, the cooling of that molten mass would then be considered an igneous rock by definition.
How is the intake air heated to such a high temperature?
It is heated to such a high temperature by going over the engine which is really hot and is part of the cooling system, the cold air goes over some part of the engine and comes out hot. It is part of the cooling system of a car, so therefor if your car has overheating problems turn the heater on.
Cooling fan to run when car is off?
If the temperature of your car engine is still very high after stopping, the car cooling fan will continue to run, and the cooling fan will not work until the temperature drops.The above answer comes from Suzhou Santian Precision Mould Manufacturing Co., Ltd.
Why does cooling happen?
Because of the second law of thermodynamics , law of entropy. "when energy flows from a high-temperature object to a low-temperature object, the source temperature is decreased while the sink temperature is increased; hence temperature differences tend to diminish over time."
What keeps a thermos at the same high temperature with out it cooling?
the thermos bottle's walls are double, with vacuum between. And vacuum is the best insulator we know.
