Question

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

Answer 1

Answer ⇒ Option (b).  Will change its shape to spherical.

Explanation ⇒ When the ice cube melts, it changes its state from solid to liquid by the absorption of the energy.

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, since the sphere are the Geometric bodies of less surface area.

Hope it helps.

Answer 2

HEY DEAR ... ✌️

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Here's , Your Answer :-

Ans.) (b) Will change its shape to spherical .


Extra information :-

When the ice cube melts at room temperature . It changes its state from solid to liquid by the absorption of the energy at room temperature .

On the surface the forces are not balanced . If the water formed after melting is close enough to the tray, the water molecule will cover the surface of the tray.

I guess you know the property of surface tension in liquids , and tendency of the liquids is to assume spherical shape in absence of any other force .

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HOPE , IT HELPS ... ✌️