Physics-
General
Easy
Question
A cylindrical vessel of 90 cm height is kept filled upto the brim. It has four holes 1, 2, 3, 4 which are respectively at heights of 20cm, 30 cm, 40 cm and 50 cm from the horizontal floor PQ. The water falling at the maximum horizontal distance from the vessel comes from
- hole number 4
- hole number 3
- hole number 2
- hole number 1
The correct answer is: hole number 3
The maximum horizontal distance from the vessel comes from hole number 3 and 4
h is height of hole from top.
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Two forces 
and 
act on a thin uniform elastic rod placed in space. Force acts at right end of the rod and acts exactly at centre of the rod as shown (both forces act parallel to length of the rod).
i) causes extension of rod while causes compression of rod.
ii) causes extension of rod and also causes extension of rod.
iii) causes extension of rod while does not change length of rod.
The correct order of True / False in above statements is
Two forces and act on a thin uniform elastic rod placed in space. Force acts at right end of the rod and acts exactly at centre of the rod as shown (both forces act parallel to length of the rod).
i) causes extension of rod while causes compression of rod.
ii) causes extension of rod and also causes extension of rod.
iii) causes extension of rod while does not change length of rod.
The correct order of True / False in above statements is
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A rod of length 1000 mm and co-efficient of linear expansion 
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, then the stress developed in therod is (in 
):
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In determination of young modulus of elasticity of wire, a force is applied and extension is recorded. Initial length of wire is ‘ 1 m’. The curve between extension and stress is depicted then young modulus of wire will be:
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A non uniform cylinder of mass m, length and radius r is having its cetnre of mass at a distance 
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A narrow tube completely filled with a liquid is lying on a series of cylinders as shown in figure. Assuming no sliding between any surfaces, the value of acceleration of the cylinders for which liquid will not come out of the tube from anywhere is given by
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