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Water in a lake is usually cooled by the cold air above its surface rather than from the ground underneath it. As the top layer of water cools its density increases and so it sinks to the bottom, bringing other water up to the surface. This water is then cooled. This carries on until the temperature reaches 4 deg C when the density reaches a maximum. Further cooling lowers the temperature of the top layer but now its density is less than that of the water below so the top layer stays on top until it freezes (if it is cold enough). That is how you can get lakes with a frozen surface but liquid water below which can sustain aquatic life and also destroy human or other life forms that fall through the ice!
For a very small region of temperature, the density of water increases as the temperature increases:For the table below, whole degrees are listed down the left hand side of the table, while tenths of a degree are listed across the top.So to find the density of water at say 3.4 °C, you would first find the whole degree by searching down the left handcolumn until you reach '3'. Then you would slide across that row until you reach the column labeled '0.4'.The density of water at 3.4 °C is 0.999970 g/mL.--0.0-----0.1-----0.2-----0.3-----0.4-----0.5-----0.6----0.7----0.8----0.9------00.9998410.9998470.9998540.9998600.9998660.9998720.9998780.9998840.9998890.99989510.9999000.9999050.9999090.9999140.9999180.9999230.9999270.9999300.9999340.99993820.9999410.9999440.9999470.9999500.9999530.9999550.9999580.9999600.9999620.99996430.9999650.9999670.9999680.9999690.9999700.9999710.9999720.9999720.9999730.99997340.9999730.9999730.9999730.9999720.9999720.9999720.9999700.9999690.9999680.999966Referring to the table you can see that the density of pure water increases from 0 °C until it reaches a maximum somewhere between 3.8 °C and 4.4 °C and then decreases continually with any additional rise in temperature.
it will not respond until it reaches the threshold level
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As water is cooled its density increases until it reaches about 4 C and then it decreases.
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Type your answer here... increases
Type your answer here... increases
Water in a lake is usually cooled by the cold air above its surface rather than from the ground underneath it. As the top layer of water cools its density increases and so it sinks to the bottom, bringing other water up to the surface. This water is then cooled. This carries on until the temperature reaches 4 deg C when the density reaches a maximum. Further cooling lowers the temperature of the top layer but now its density is less than that of the water below so the top layer stays on top until it freezes (if it is cold enough). That is how you can get lakes with a frozen surface but liquid water below which can sustain aquatic life and also destroy human or other life forms that fall through the ice!
Density increases until 4 degrees of celcius.Then decrease again.
As θ increases from 0 to π/2 (90o) sin θ increases until it reaches a maximum value of 1 when θ = π/2. As θ increases from π/2 (90o) to 3π/2 (270o) sin θ decreases until it reaches a minimum value of -1 when θ = 3π/2. As θ increases from 3π/2 (270o) to 3π (360o) sin θ increases until it reaches the value of 0 it had when θ = 0. From this point, as θ increases (by the same amounts) sin θ repeats this same cyclic behaviour.
Buoyant air will rise until it reaches warmer air that is the same density as itself.
It continues to cool until it reaches it's boilng point. At which it will condense then cool further until it reaches it's melting point. It will then continue to cool until it's entropy is minized at absolute zero.
When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees Celsius is reached. After that, it expands slightly until it reaches the freezing point, and then when it freezes it expands by approximately 9%
Actually, as you go from the surface of the earth to space, temperature decreases until it reaches approximately 15 km( the tropopause). Then it increases until it reaches approximately 50 km ( stratosphere) . then it decreases again until the dheight is about 80 km ( mesosphere), then it increases again in the thermosphere up until 120 km above sea level.
It melts if has frozen, but far more interestingly, the volume of the water contracts until the temperature reaches 4 degrees C. That is the point of maximum density of water. Once past 4 C, the volume increases slowly (as the density declines) with more added heat.