National Standard Examination in Astronomy (NSEA) Solved Paper 2016 Part-6
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Q: 15. Adjacent figure shows a block A, held by a spring balance D and submerged into a liquid in a beaker. The beaker is kept on a weighing balance E. Mass of the beaker plus the liquid is 2.5 kg. Balance D reads 2.5 kg and E reads 7.5 kg. Volume of the block is 0.003 Consider the following statements.
(i) The density of the liquid is 5000⟋3
(ii) The mass of block A is 7.5 kg
(iii) The buoyant force is 5 kg wt
(iv) If half the volume of the block is pulled out of the liquid, E would read 5 kg Select correct options (S)
(A) (i) , (iii) and (iv)
(B) (i) , (ii) and (iv)
(C) (i) and (iv)
(D) (i) , (ii) , (iii) and (iv)
Answer: (D)
Q: 16 AM-HM inequality for position real numbers a, b, c states that . If a, b are positive irrational numbers then.
(A)
(2)
(3)
(D)
Answer: (C)
Q: 17. The optical effects (phenomena) involved when we see a rainbow could be associated with
(i) Internal reflection
(ii) Dispersion
(iii) Total internal reflection
(iv) Deviation
Select the correct options
(A) (ii) , (iii) and (iv)
(B) (i) , (ii) and (iv)
(C) (i) and (iv)
(D) (iii) and (iv)
Answer: (B)
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