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At a defined temperature a lubricant become semisolid and doesn't easily flow: this is the pour point. This is important to establish the temperature range in which this lubricant can be used.
it is the lowest temperature at which a liquid changes into semi solid and loses all its flow characteristics.
Heat will flow from the body with the highest temperature to the lowest temperature body until the temperatures are the same.
The definition of pour point is the lowest temperature at which a liquid begins to turn into a solid, so much so that it can no longer flow.
It is called a convection.
It's called wind.
wirebuss barelectric railetc.
In most realistic situations heat flow can be said to occur from a region of higher temperature to one of lower temperature. As the region of higher temperature loses heat and the other region gains heat their temperatures become closer and the rate of heat flow diminishes. If, however, it can be contrived to maintain the source of heat at a constant temperature and the destination of the heat also at a constant temperature, then the heat will flow between the two at a constant rate, called steady heat flow.
capillaries!
Continuous flow
higher temperature equals more flow, which reduces mpg.
Air will flow out of a building when the outside temperature is warmer.