For all valuable purposes the load will remain 1000 pounds once you freeze it. In concept the massive of the water will mitigate somewhat with cooling since it will contain less energy when frozen, yet the result would be completely negligible.
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Although the weight will certainly be the same, water increases in volume by around a tenth together it freezes (which is why, because that example, pipes to explode in icy weather). Due to the fact that it is because of this less dense, her frozen block that 1000 pounds the ice will certainly float top top water, yet that is because its volume has expanded on freezing and also not since its weight has reduced.
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edited Oct 16 "19 in ~ 13:13
answered Oct 16 "19 at 6:36
Marco OcramMarco Ocram
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Depends on just how you are defining "weight".
If you mean weight as in the vector or scalar of the gravity exhilaration on one object, Marco"s answer is what girlfriend want.
There is a third an interpretation of weight. This is essentially "what a range measures". This meaning also fits v how world typically experience the impacts of weight.
If we usage that definition, then when standing ~ above Earth, you might say your weight is what is countered by the normal pressure of the ground. By this definition, astronauts in orbit are also "weightless", even though lock still have actually mass, and gravity acting on them.
Now, when you freeze the water, the mass remains the same (so the downward pressure $mg$ is the same); however the upwards buoyant pressure from the wait increases, due to the boosted volume. Due to the fact that the mass remains the same and buoyancy increases, this method the net downward force of the ice block will certainly reduce, and therefore it"s "weight" as measured through a scale would decrease.
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In the context of the Quora question, ns think this third meaning of load is the many relevant; due to the fact that it is the easiest method to measure weight, and also is commonly what a layperson think of as soon as they think about "how much does this thing weigh?". This is why human being will say freezing water will reduce it"s weight.
If it were weighted in a vacuum, friend wouldn"t mean to check out a detectable adjust in weight as result of freezing. But vacuum problems aren"t the usual human experience, and most people don"t have access to a vacuum chamber through a range in it.