A system is created where a 1-propanol diffuses across a stagnant thin film of liquid water (0.10mm thick). The concentration of propanol on one side of the film is 1.2 kg/m3. The target flux of propanol through the film is 0.2 x 10-5 kg/(m^2s). The system is maintained at 25 degrees Celsius. Determine the following: a). What is the concentration of the other side of the water film? (Note: As the direction of diffusion is not defined, there are going to be two answers. Please provide both) b). What are the equations the describe the concentration profile in the film for both possible answers

5. Explain the physical significance of the number of transfer units NTU = hA, /mc is remired?

Question 1 Make a short report on “History of rocket propulsion”. Question 2 Define the following (with the help of hand sketches) for solid rocket engine: a. Delay time b. Rise time c. Action time d. Burning time e. Progressive burning f. Regressive burning g. Neutral burning Question 3 Draw the different types of grain configurations (by hand) and write their type of burning. Question 4 Make a table of various propellants used in rocket propulsion. This may include propellant name, fuel and/or oxidizer, chemical formula (if available), physical state (solid/liquid) etc. Question 5 Draw the neat sketches (by hand) of solid and liquid rocket systems separately. Label various components of the same. Question 6 Make a short report on vehicles used for space missions recently.