Question

(d) TU
(C) -
Ans. (b)
39. At atmospheric pressure, helium condenses into a normal liquid at
(a) 4.2 K
(b) 0.42 K (c) 3 K (d) 3.2 K
Ans.(a)
40. The Fermi enerov of electron das in conner at 300 Kis​

Answer 1

Explanation:

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