Question:
Two solid pieces, one of steel and the other of aluminium when immersed completely in water have equal weights. When the solid pieces arc weighed in air
Two solid pieces, one of steel and the other of aluminium when immersed completely in water have equal weights. When the solid pieces arc weighed in air
Updated On: Apr 14, 2024
- steel piece will weigh more
- they have the same weight
- aluminium piece will weigh more
- the weight of aluminium is half the weight of steel
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The Correct Option is C
Solution and Explanation
aluminium piece will weigh more
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Concepts Used:
Pressure
Pressure is defined as the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Everyday examples of pressure are:
- The working of the vacuum cleaner is an example of pressure. The fan inside the vacuum creates a low-pressure region which makes it easy to suck the dust particles inside the vacuum.
- Using a knife for cutting is another example of pressure. The area exposed from the knife is small but the pressure is high enough to cut the vegetables and fruits.
Formula:
When a force of ‘F’ Newton is applied perpendicularly to a surface area ‘A’, then the pressure exerted on the surface by the force is equal to the ratio of F to A. The formula for pressure (P) is:
P = F / A
Units of Pressure:
The SI unit of pressure is the pascal (Pa)
A pascal can be defined as a force of one newton applied over a surface area of a one-meter square.