GATE PH 2022 Paper 1 — page 21

Questions 61–63 of 65. Imported answers require review unless explicitly marked reviewed.

Two identical particles of rest mass

approach each other with equal and opposite velocity

, where

is the speed of light. The total energy of one particle as measured in the rest frame of the other is

. The value of

is ______________ (Round off to two decimal places)

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In an X-Ray diffraction experiment on a solid with FCC structure, five diffraction peaks corresponding to (111), (200), (220), (311) and (222) planes are observed using 1.54 Å X-rays. On using 3 Å X-rays on the same solid, the number of observed peaks will be ______________

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For 1 mole of Nitrogen gas, the ratio

of entropy change of the gas in processes (I) and (II) mentioned below is ______________ (Round off to one decimal place)

(I) The gas is held at 1 atm and is cooled from 300 K to 77 K.

(II) The gas is liquified at 77 K.

(Take

, Latent heat

)

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2022 · Paper 1

Question 61

Question 62

Question 63