Question

Given scientific reason's.

1) The wall of a dam is broad at it's base.
2)Don't use lifts at the time earthquake.​

Answer 1

Answer:

1) the pressure is also maximum at the base. To withstand this pressure of the fluid, the wall of the dam is made broad at its base. Hence, the wall of a dam is broad at its base to withstand the pressure of the liquid.

2) Lifts should not be used at the time of earthquake, because if the earthquake is too strong on the Richter's scale, it may cut the power. And, in this case, a person may be trapped in there for an uncertain period of time, till it is reconnected. Then, it is better to avoid it before and after the shocks.

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Answer 2

1 -- In the given question, depth is maximum at the base of the dam, thus the pressure is also maximum at the base. To withstand this pressure of the fluid, the wall of the dam is made broad at its base. Hence, the wall of a dam is broad at its base to withstand the pressure of the liquid.

2 -- During an earthquake, the power supplies are cut off and you may get stuck in the elevator for a long time. ... So, it is advised not to use lifts at the time of the earthquake.