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Questions

Physics

Subjective Questions
A wire having linear density of 0.05 g cm^-1 is stretched between two rigid supports with a tension of 4.5 x 10⁷ dynes. It is observed that the wire resonates at a frequency of 420 Hz. The next higher frequency at which the wire resonates is 490 Hz. Find the length of the wire.

Chemistry

The values of

for the reactions 2NO(g)

N₂(g) + O₂(g) and NO(g) +

Br₂(g)

NOBr(g) are 2.4 x 10³⁰ and 1.4, respectively at 300 K. Calculate the value of K_c for the reaction

N₂(g) +

O₂(g) +

Br(g)

NOBr(g).

Mathematics

Passage Based Questions
Passage I
If #(A) denotes the number of elements in the finite set A and A₁, A₂, ............... are finite sets, then

The number of permutations of 1, 2, 3, 4, 5, 6 such that pattern 12, 23, 34, 45, 56 do not appear in the permutation is

(a)	429	(b)	430
(c)	431	(d)	441

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