The motion of a particle is defined by the relation 3 2 4 3 2
x  t  t  t 
Where x and t are expressed in meters and seconds, respectively.
Determine the position,
1. The velocity, and
2. The acceleration of the particle when t= 2s.

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.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false