i. Define: Pressure, two units of pressure and their relationship with force?
ii. What are the factors upon which the pressure exerted by liquids depend
on?
iii. What is meant by ‘Atmospheric Pressure’ and which instrument is used to
measure the same?
iv. Why is it easier to walk in soft sand if we have flat shoes rather than sharp
heels
Answers
Answer:
1) Pressure is the force per unit perpendicular area over which the force is applied. In equation form, pressure is defined as. P=FA P = F A . The SI unit of pressure is pascal and 1 Pa=1 N/m2 1 Pa = 1 N/m 2 .
2) Pressure within a liquid depends only on the density of the liquid, the acceleration due to gravity, and the depth within the liquid. The pressure exerted by such a static liquid increases linearly with increasing depth.
3) barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. ... Atmospheric pressure is an indicator of weather. Changes in the atmosphere, including changes in air pressure, affect the weather. Meteorologists use barometers to predict short-term changes in the weather.
4) Flat shoes have greater area in contact with the soft sand as compared to heels. Due to this, there is less pressure on soft sand because of which they do not sink much in the sand and it is easy to walk on it.
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Answer:
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