Question

i need this answer pleez
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Answer 1

Answer:

due to atmospheric pressure

Answer 2

Answer:

Given:

A setup consisting of candle, an inverted cylinder placed over the burning candle and liquid is placed inside the setup.

Concept:

1. We know that burning of candle requires oxygen.

Now when the candle is being burnt inside the inverted cylinder, it uses the limited oxygen present within the setup.

When all the oxygen gets used up, there is formation of low pressure within the inverted cylinder.

This low pressure pulls the liquid into the upper inverted cylinder.

2. This experiment proves that

• Oxygen is required for burning of candle
• Low pressure pulls substances towards itself.