John suddenly came to know he is gonna have guests on a hot afternoon just before their arrival. He needs ice but if he keep normal water he was sure he will definitely end up with just cold water with little ice.
So..what he did?!!!
He heated water for some time..and then kept in freezer...Guests arrived...
Amazingly water was completely frozen...Wow!!!
You might be wondering, even though he heated water, how he still got his water frozen...even faster!!!!
Yes it is TRUE.
Hot water freezes faster than normal water.
This is called as Mpemba Effect, named after a Tanzanian student who discovered that a hot ice cream mix freezes faster than a cold mix in cookery classes in the early 1960s.(However, the effect has been noted by many scientists throughout the history including Aristole, Franicis Bacon.)
Why this effect...how it is happening!!!
We know that water is most abundant and most useful fluid..and mysterious too...
It has many peculiar phenomenon such as:
Unlike remaining matter, water's solid form(ice) has less density than liquid form .. which is why ice floats on water...
And Mpemba effect is one such effect...there are some explanations for this effect as following..
1.Warm containers make better thermal contact with a refrigerator and so conduct heat more efficiently. Hence the faster freezing.
2.Warm water evaporates rapidly and since this is an endothermic process, it cools the water making it freeze more quickly.
However, none of the explanations so far are entirely convincing.
Let us not bother about why it so...use it to server our purpose...
Take care,buddy..
Good day.
So..what he did?!!!
He heated water for some time..and then kept in freezer...Guests arrived...
Amazingly water was completely frozen...Wow!!!
You might be wondering, even though he heated water, how he still got his water frozen...even faster!!!!
Yes it is TRUE.
Hot water freezes faster than normal water.
This is called as Mpemba Effect, named after a Tanzanian student who discovered that a hot ice cream mix freezes faster than a cold mix in cookery classes in the early 1960s.(However, the effect has been noted by many scientists throughout the history including Aristole, Franicis Bacon.)
Why this effect...how it is happening!!!
We know that water is most abundant and most useful fluid..and mysterious too...
It has many peculiar phenomenon such as:
Unlike remaining matter, water's solid form(ice) has less density than liquid form .. which is why ice floats on water...
And Mpemba effect is one such effect...there are some explanations for this effect as following..
1.Warm containers make better thermal contact with a refrigerator and so conduct heat more efficiently. Hence the faster freezing.
2.Warm water evaporates rapidly and since this is an endothermic process, it cools the water making it freeze more quickly.
However, none of the explanations so far are entirely convincing.
Let us not bother about why it so...use it to server our purpose...
Take care,buddy..
Good day.
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