A mixture of 1 kmol of hydrogen (H2) and n kmol of oxygen (O2), initially at 25∘Cand 1 atm, burns completely in a closed, rigid, insulated container. The contauier finally holds a mixture of water vapor and O2 at 3000 K. The ideal gas model applies to each mixture and there is no change in kinetic or potential energy between the initial and final states. Determine a. the value of n. b. the final pressure, in atm.

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise