Question

Demerits of sand clock​

Answer 1

Explanation:

The disadvantage is that they had to be on flat surfaces to work properly. With regard to work, this hourglass is a short duration clock. It is very rare that such a model works for more than 1 hour. And also it is not possible to determine time accurately with this.

Answer 2

Answer:

The disadvantage is that they had to be on flat surfaces to work properly. With regard to work, this hourglass is a short duration clock. It is very rare that such a model works for more than 1 hour. And also it is not possible to determine time accurately with this.

Explanation:

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