A unibody strut tower is being installed using a GMAW (MIG) welder. Technician A says that a mixture of 75% argon and 25% carbon dioxide
could be used.
Technician B says that a mixture of 75% argon and 25% helium could
be used
Who is right?
* (A) A only (C) Both A and B
(B) B only (D) Neither A nor B

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

On a average work day more than work place firs are reorted

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?