Question
A liquid of density ρ is rotating in a cylindrical
vessel with constant angular velocity ω. The free surface of the liquid takes the shape of:Solution
When a liquid rotates inside a cylindrical vessel with constant angular velocity ω, every fluid element experiences a centrifugal force directed radially outward due to rotation. At the same time, gravity acts vertically downward. To find the shape of the free surface, we use the condition that the pressure on the free surface is constant (equal to atmospheric pressure), and hence, the total potential energy per unit mass remains constant along the surface. Let us consider a point on the free surface at a radial distance r from the axis of rotation and vertical height z above some reference level. 
Her parents were (A)/not interest in spending (B)/money on her education (C).
Directions: In each of the questions, a sentence has been divided into four parts, one of which may contain an error. Identify that fragment and mark i...
Either my brother or his friends is lying.
Less of 10 per cent of (1)/ global climate finance and (2)/ only 1.2 per cent of humanitarian (3) /funding reaches local actors in cities.(4)
The decision to cut the prices were taken after a fortnightly review meeting of the oil companies.
The concept of ugly 1)/ and beautiful 2)/ are interchangeable 3) /and relative 4) /5)
Read the sentence to find out whether there is any grammatical or idiomatic error in it. The error, if any, will be in two parts of the sentence. Mark ...
In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate optio...
Despite incessant rains, she is the only one who plan to attend the meeting at the ministry.
Identify the segment in the sentence, which contains the grammatical error
No matter he tries hard he cannot play the guitar.
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