Across the normal shock, the fluid properties change in such a manner that the

Question

Consider the following statements:

Across the normal shock, the fluid properties change in such a manner that the                                           

1. Velocity of flow is subsonic
2. Pressure increases
3. Specific volume decreases
4. Temperature decreases which of these statements are correct?

a) 2,3 and 4                 b) 1,2 and 4

c) 1,2 are 4                  d) 1,2 and 3