Cracks.

A thick corked glass bottle containing frozen water is kept in a room. When the ice melts, some cracks are observed on the bottle because

of the uneven contraction in the glass walls. of the uneven expansion of the glass walls. glass becomes weaker as the temperature decreases. the density of ice is less than the density of thick glass.

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1 solution

Ekene Franklin
Nov 8, 2018

Glass is a poor conductor of heat, so there will be a difference in the degree of contraction (due to low temperature) between the outer glass wall and the inner glass wall. This uneven contraction \boxed{\text{uneven contraction}} will cause the cracks noticed on the glass.

"Uneven contraction" is not correct. The bottle breaks because the water expands as it turns to ice. Same thing happens in the winter with frozen water pipes that start to leak when the water melts. The correct answer is not given as an option.

Laszlo Mihaly - 2 years, 7 months ago

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Look at my explanation for your report, sir.

EKENE FRANKLIN - 2 years, 7 months ago

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I did. It does not mention that the reason for cracking is the water turning into ice. Your explanation would work if you take a hot piece of glass and drop it into water. But that is not the question.

Laszlo Mihaly - 2 years, 7 months ago

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@Laszlo Mihaly The water is not turning into ice. Ice is turning into water.

EKENE FRANKLIN - 2 years, 7 months ago

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