Question

Give reasons for the following-. I) Aircrafts have pressurized cabins.
II)A sharp knife can cut objects more effectively than a blunt knife.​

Answer 1

Answer:

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Explanation:

1) aircrafts fly at heights where the pressure is considerably low so in order to prevent it from getting crushed the cabins are pressurized to withstand the pressure

2) a sharp knife has a smaller surface area in contact than a blunt knife. Since pressure is indirectly proportional to area a sharp knife will apply more pressure. a blunt knife however will apply less pressure by the same logic

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Answer 2

Answer:

aircraft Sar pressurized because the air is very thin in the altitude they fly.