I think the reason behind the freezing of supercooled water from top to bottom after the slam is that when slowly-slowly ice crystals were formed after that slam, it floats up because ice has a lower density than liquid water and that we eventually see as the freezing of water from top to bottom.
I think it has to do with inertia when you slam the bottle the supercooled water moves up and slams the bottle cap and the energy then travels from top to bottom
Yeah not exactly But according to me - Before hitting the bottle the molecules of water are in rest, if we hit the bottle, the bottle gives an external unbalanced force to the water molecules, so they starts moving randomly, this random movement cause the water molecules to form the hexagonal structure. The density of this hexagonal structure is less then the density of water, therefore the buoyant force causes this hexagonal structure to move in the upward direction.
The density of ice is less than that of liquid water. Therefore, ice floats on the surface. Thus, the ice layer at lower temperature floats over the water below it. Due to this, the freezing of water into ice occurs continuously from the top towards the bottom. Amazing explanation sir!!!
The ice starts freezing from the top and freezes last at bottom because of pressure . Water expands on freezing as water moleculer arranges themselves in hexagonal structures , because of this the pressure tries to resist it , due to this where there is more pressure, water takes more time to freeze . As there is less pressure on the top it freezed first and has higher pressure at bottom is higher so it took more time to freeze. I love you app and also content, animation,teachers and whole team I am also a premium student
It is due to the convection forces..... The water which is cool moves down and on the other hand the water goes upwards to make the temperature uniform in the whole bottle . The water in the upper side moved down because it was cooled and the nudge made them perfectly aligned.
The Reason I think why freezing takes place from top to bottom: Inertia of Rest: When the bottle was slammed on the desk, and stopped on the horizontal surface the water at the lower level remained at rest, while the water at the higher level got the sudden jerk/ nudge needed to start the freezing into solid Anomalous Expansion of Water: We know ice is less denser than water due to the cage-like structure; causing it to have more empty spaces between its particles compared to the spaces between the particles of liquid water. Thus, the water (of the same temperature) but which froze earlier would float on the liquid water. Then I think energy travels from top to down and the extra jerk passes on the water below. This continues till there is enough jerk motion to freeze the water and (that is why I think the water near the base is still in liquid form)
I think Its because of density difference between water and ice. Due to anomalous expansion of water, ice formed will rise and settles above water, as the process continues it later reaches the bottom.And thats why we see ice forming from top to bottom.
i think this phenomenon happens due to their differences in the densities between water and ice....... at first , water get freeze and floats on it with the continuous process it seems to be like freezing from top to buttom
When we give force from bottom by hitting the bottle in table , there we be change in momentum ie. bottom force tranfer to up . So that the water freeze from up to down
i think it happens because when we slam the bottle them lower water instantly give force to water in upper region and when it get more force then it will freeze instantly. by the way i think it can freeze more instantly when we give more pressure on it
The ice formed on the top exert an force downwards on the liquid which easily allows the molecules to form the cage and converting into ice and this process goes till the whole water is not converted into ice .
It from a shape at the very beginning of bam . When 1st shape made then other molecules take this shape as common , for this reason it start at bottom and till to last . And also thanks to BYZU for such kind of beautiful video. ❤❤❤
Because gravity pulls things down in other hand if we talk about ice in the water the ice will float because of the lesser density of ice and higher density of water
Inertia of rest has something to do with the instant freeze of water in bottle as when bottle falls upright to the horizontal surface the bottle stopped but ice from top was still in motion up to bottom and then instant freeze process takes place from top to bottom
May be the temperature difference, because there is difference in specify heat capacity of water and the bottle cap (pp or hdpe) leads to phase change of water by an external hitting force.
Is it because when we take the bottle out of the refrigerator, the water molecules are at rest but when we slam the bottle , the water molecules stay at that place due to inertia of rest but the bottle moves down which makes the water molecules hit the cap of the bottle first so the water freezes from the top
I kept a bottle full of water in refrigerator. After few hours the water freezed. Then when I kept this bottle outside therefrigerator the ice started melting. When the ice melted half of its size I opened the bottle and then added water of normal temperature after sometime the bottle became dimpled as if air had been taken out. Why did this happen?
Because when you have slammed the bottle the energy(movement) you have given just act as the movement in which the minerals helps to keep the molecular in a hexagonal shape .. which starts at top of the bottle because you have slammed towards down in which the molecules inside the water starts vibrating from the top of the bottle!..? Is that coooollll..! 🥶
I think it's about pressure!! We all know pressure is high at the bottom of bottle then the top, so obviously if there is high pressure...there should be more energy and hence Bottom part with high energy molecules take more effort to form a lattice like structure than top part! Hence we see top part (with low pressure hence low energy) freezing first then the freezing moves from top to bottom 😀 Am I right sir? 🤓
It has to do something with inertia but due to the gravitational force after the slam a kinetic energy was released from the top of the bottle and by which the gravitational force gave the kinetic energy a support , hence the water became to freeze from the top to the bottom. Please check this answer if it is wrong please correct me
I think when he jerk the bottle on the table the upward force is exerted that pushes the water molecules upward to form cage like structure from the top hope that may be right👍👍👍👍👍
the nudge provided to water molecules due to the slam gets transferred to adjacent molecules from top to bottom l. hence freezing occurs from top to bottom
You said only 1 cage like structure has to be form and rest automatically formed by domino effect so first cage like structure your nudge made and rest domino effect moves below so........
But sir we know that adding impurity cause depression in freezing point . Or here adding impurity means more solute than normal water . Please clarify this doubt sir
I think it has something to do with the slam.When we slammed it,the water moved upward because of this the jerk was first created at the top. Even if we slam the bottle up side down,the water will freeze from an up-to-down motion
Is it because ice is less dense than liquid water? So while the top ice floats, it takes over the liquid water underneath by freezing it from up to down manner, does it?
I think when we slam the water, we first move the bottle at hand to top and then to surface. For the top movement, the topper molecules get frozen first and then it keeps freezing slowly and when we slam, the bottom molecules freeze instantly and we see that it is freezing from top to bottom. We don't notice the small portion frozen at top. Am I right byjus?
The reason behind the freezing of water from top to bottom is that ice has less density than water . So , when you slammed the bottle , water started freezing from the top . 🧊🧴
