An ice cube is suspended in vacuum in a gravity free hall. As the ice melts it

will retain its cubical shape

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will change its shape to spherical

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will fall down on the floor of the hall

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will fly up

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Solution

The correct option is B will change its shape to spherical
When the ice cube melts, it changes its state from solid to liquid. This melted liquid has open surfaces where the surface tension forces come into play. These surface tension forces have a tendency to minimize the surface area. Since the melted ice cube is in a gravity-free hall, it has open surface all around. The minimum surface area is achieved by getting a spherical shape.

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Similar questions

Q. An ice cube is suspended in vacuum in a gravity free hall. As the ice melts it
(a) will retain its cubical shape
(b) will change its shape to spherical
(c) will fall down on the floor of the hall
(d) will fly up.

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