The value of g at a particular point is 9.8 ms-2. Suppose the earth suddenly shrinks uniformly to half its present size without losing any mass. The value of g at the same point (distance of the point from the centre of earth does not change) will now be
 
1.  9.8 ms-2

 


A sphere of solid material of relative density 9 has a concentric spherical cavity and just sinks in water. If the radius of sphere be R, then the radius of cavity (r) will be related to R as
1.  r3 = \({{8}\over{9}}\)R3
2.  r3 = \({{2}\over{3}}\)R3
3.  r3 = \({{\sqrt{8}}\over{3}}\)R3
4.  r3 = \({{\sqrt{2}}\over{3}}\)R3

 

Subtopic:  Archimedes' Principle |
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