Water attains its maximum density at about 4°C because it is at that temperature that hydrogen bonds form. The effect of the formation of these bonds is that molecules of water are actually pushed apart and into an alignment scheme (crystals) that prevents them from more closely packing together as in the liquid state.
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At any temperature, water molecules have some thermal motion. The thermal motion of molecules causes some expansion of the volume. When water is cooled to about 4 0C, the water molecules have almost reached their lowest thermal motion and are thus very dense, but still have just enough motion to prevent organization into hexagonally-organized crystalline ice. Below 4 0C the water molecules tend towards the hexagonally organized structure of ice and thus the volume expands a bit, reaching its minimum density when the ice forms.
This is special characteristics to water. Although in liquids, generally, the liquid density increases with temperature decrease but in water when temperature decrease from 4 to zero (water freezing into ice) the density decreases. This results in Ice formation in rivers and polar areas and its floating to the surface because of its less density than water keeping water underneath at 4 degrees which is enough for aquatic species to remain alive in water while the ice on the top is acting as insulator.
-ELO-
As water begins to freeze, the molecules must spread out to form latices of ice.
When water cools from room temperature (21C) to 4C it gets more dense due to thermal contraction. Then between 4C and 0C it expands rather than contracts and becomes less dense. This is a molecular oddity. At 0 C it freezes and expands even more, becoming even less dense. That is why ice floats on water
When water freezes, air bubbles form and it becomes less dense.
it is at its max density at 3.98 degrees centigrade because it is the temp at which hydrogen bonding takes place.
GOD KNOWS!!
ask him!!
It is supposed that strong intermolecular interactions are involved for this anomaly.
According to the "Textbook of Dendrology," American sycamores (Platanus occidentalis)can attain an age of 500-600 years.
it allows it to attain food through photosynthesis
If the subject uses their dominant forearm more, that forearm can attain more force. The greater the force, the greater the degree of activation of motor units. However, in most cases, the non-dominant forearm generally can attain more force.
To attain relief for a sore on tongue, take half a teaspoon of turmeric and mix into a cup of warm milk. You should do this twice a day for best results. Chamomile tea can also help soothe tongue sores.
The reciprocal evolution of flowers and insect mouth parts has occurred over millions of years. The flowers change to make their nectar inaccessible to insects while insects change to be able to attain the nectar.
Everything.
The maximum speed the space shuttle can attain is about 30,000 K MPH in atmosphere.
when the vertical component of its velocity is zero.
15 reds, 15 blacks and then the colors.
There is no evidence she attained any degrees. She graduated from high school and then began her career, first as a model and then as a singer.
it can tell the voodoo doctor who is boss
Dial up is 56kb; DSL is about 10mbs.
In the University of Maryland, there are several degrees which one can attain. Some of these include but are not limited to Accounting, Aerospace engineering, Chemistry, Dance, and Criminology.
Most geysers water temperatures are around 200 degrees f. Known geysers differ in their temperatures and are between 174 and 205 degrees. Close enough?
There is difference between relative density and density.Density: it is the ratio of total weight of given sample to the total volume of that given sample, for example soil.Relative density: it is the ratio of the two densities,field density to the laboratory density. this is particularly useful and is used in the fields as it is not possible to attain 100% density which we determine in the laboratory tests, as the laboratory tests are conducted in controlled environment and we can not do that in case of field because of vastness. also field density is less then the laboratory density.
This is a simple derivation problem. Take the derivative of the AC voltage waveform (I'll assume sin (t)), and set the derivative equal to the maximum value it can attain (which is 1): cos (t) = 1, t = 0 degrees, thus for an AC waveform of y = sin(t), the fastest increase in voltage occurs at 0, 360, etc. degrees. The fastest decrease in voltage will occur at 180, 180 + 360, etc. degrees.
The rocket would attain a maximum height of 158.65 feet (63.65 feet from the top of the structure).