TRB Old Question Papers for Physics - 4

Question: 16

Who invented air conditioning?

(A) Wills Carrier

(B) Erik Rotheim

(C) Nicolas Joseph Cugnot

(D) Joseph Lister

Question: 17

What is the S.I. Unit of entropy?

(A) 0.01 cm

(B) 0.02 cm

(C) 0.001 cm

(D) 10^-6 m

Question: 18

What is the approximate value of escape velocity for the earth?

(A) 11 km/s

(B) 19.5 km/s

(C) 56.5 km/s

(D) 50 km/s

Question: 19

______ was the inventor of cosmic rays.

(A) Bruno Rosi

(B) Copernicus

(C) Edvin Hebel

(D) Victor Hess

Question: 20

The latent heat of fusion of ice is ____ cal/g.

(A) 69.7

(B) 76.9

(C) 79.7

(D) 68.9