(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A ceiling can blow off due to pressure difference between the inside and outside of the house. In a magazine, it said: "Let's have a ceiling of 100 square meters. A pressure difference of 1% of the air pressure between the two sides of the ceiling is equivalent to a lift of 10 tonnes. We see that the ceiling should be properly fixed against being lifted up.

a) On which side of the ceiling is the air pressure the greatest when it blows heavily outside?

b) What can be meant by the phrase "a lift of 10 tonnes"?

c) Perform calculations that confirm the information in the text.

d) When it's windy out, it's a good idea to open air lanterns in the house. Why?

2. Relevant equations

p=F/A

3. The attempt at a solution

b) What can be meant by the phrase "a lift of 10 tonnes"?

F=ma=10 000kg*9,81m/s^2=98 100Nā100kN

Question b is the only one I get right. I don't know how to solve the rest because my book only tells me the equation p=F/A and does not have any more information about pressure.

Really appreciate some help :)

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# Homework Help: Pressure difference

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