Air at a pressure of 350 kPa, a temperature of 80°C, and a velocity of 180 m/s enters a convergent–divergent nozzle. A normal shock occurs in the nozzle at a location where the Mach number is 2. If the air mass flow rate through the nozzle is 0.7 kg/s, and if the pressure on the nozzle exit plane is 260 kPa, find the nozzle throat area, the nozzle exit area, the temperatures upstream and downstream of the shock wave, and the change in entropy through the nozzle.

Air is supplied to a convergent–divergent nozzle from a large tank in which the pressure and temperature are kept at 700 kPa and 40°C, respectively. If the nozzle has an exit area that is 1.6 times the throat area and if a normal shock occurs in the nozzle at a section where the area is 1.2 times the throat area, find the pressure, temperature, and Mach number at the nozzle exit. Assume one-dimensional, isentropic flow.

For the project you have selected for this class, do the following: "House maintenance"

   a. Collect the appropriate data to analyze (characterize) the current situation.

   b. Decide which tool(s) from the course will be used in the analysis.

   c. Analyze data using the tool(s) selected.

   d. Determine course of action based on the analysis (improved situation).

A liquid at 300 F flows through a 3-in. steel pipe (schedule 40) covered with a ½ in. thickness of asbestos insulation. The ambient temperature is 80 F. The inside surface film coefficient is 40 Btu/hr-sq ft-F, and the outside surface film coefficient is 4.0 Btu/hr-sq ft-F. The thermal conductivities of steel and asbestos can be taken as 25 and 0.11 Btu/hr-ft-F respectively. What's the heat loss per foot length of the pipe?

A liquid at 300 F flows through a 3-in. steel pipe (schedule 40) covered with a ½ in. thickness of asbestos insulation. The ambient temperature is 80 F. The inside surface film coefficient is 40 Btu/hr-sq ft-F, and the outside surface film coefficient is 4.0 Btu/hr-sq ft-F. The thermal conductivities of steel and asbestos can be taken as 25 and 0.11 Btu/hr-ft-F respectively. What's the heat loss per foot length of the pipe?

in viscous damping free vibration response what has the most powerful effect among m, c, k and initial condition? please write the reason.

A 2,900 square foot retail (sales) space located in Lewiston, ID is to be maintained at 69ºF DB. The total heating load for the space is calculated to be 130 MBH. The space is supplied by a heating only unit and is applied as a single zone configuration. Assume there are 45 people in the space.

What is the heating load on the unit coil?

Compare and contrast spin recovery procedures of two different aircraft. What makes the recoveries different for each aircraft?

A steel has a modulus of elasticity of 29,000 ksi and an elastic limit of 52 210 psi. A rod of this material and cross section of 0.0186 in2 and 36 in length is fastened vertically to a beam with a load of 410 lb at the opposite end. Determine: a) If this load is removed, will the bar return to its initial length? Justify the answer; b) The unitary deformation of the bar in these conditions; c) The minimum diameter of a bar of this material and that does not present permanent (plastic) deformation when subjected to a load of 11,500 lbs.

answers :a) 157.17 MPa  360 MPa (SLE) b) 0.076 %; c) 0.0134 m.

Develop a single or set of event trees to describe the escalation mechanism that would lead to an impairment of a TR from a fire or explosion in an adjacent module. Your event tree(s) should include the direct effects of fire and explosion and escalations which may lead to impairment of the TR by fire, smoke or structural failure. Present your event tree(s) and discuss all underlying assumptions

A laboratory drying oven has a composite wall made of Plane Wall 1 and Plane Wall 2 as shown above. A thin film heater (surface heat source, thickness negligible) is sandwiched between the two plane walls 1 and 2. Plane Wall 1 has a thickness L1 = 0.02 m and a thermal conductivity k1 = 0.05 W/m·K, while Plane Wall 2 has a thickness L2 = 0.01 m and a thermal conductivity k2 = 0.1 W/m·K. During steady state operation, the oven air maintains a constant temperature T∞,2 = 60 ˚C, while the heater layer is controlled at a temperature of TH = 90 ˚C. The drying oven is put inside a room where the ambient air temperature T∞,1 = 30 ˚C, and the heat transfer coefficient between the outer surface of the Plane Wall 1 and the ambient air h1 = 3 W/m2 ·K. First, assume the heat transfer coefficient between Plane Wall 2 and the oven air is h2 = 3.5 W/m2 ·K. For simplicity, assume that the drying oven has 4 side walls (each is 0.5 m long and 0.5 m high), and both the top and bottom surfaces of the oven are perfectly insulated. Consider the oven air and ambient air as an ideal gas with density ρ = 1.13 kg/m3 , specific heat capacity cp = 1000 J/kg·K, kinematic viscosity v = 15x10-6 m2 /s, thermal conductivity ka = 0.027 W/m·K, volume expansion coefficient β = 3.4x10-3 (1/K) and a Prandtl number of Pr = 0.71. Contact resistances do not occur. Additionally, all effects of thermal radiation may be neglected.

1.The population of India in the year 2000 was 1 billion and it increased exponentially at a rate of 1.6% per year. If the growth rate is maintained, what will be the population in the year 2020? If the growth rate is decreased to 1.2% per year from 2020 onwards and is maintained at that level, what will be the population in the year 2050? Assuming the average human exhales 2.3 pounds of carbon dioxide on an average day, what is the total amount of Carbon released in the atmosphere annually by human exhalation (in billion tonnes) around the year 2020?  

2.Calculate the suspended particulate concentration (in μg/m³) in a sample collected through a hi-vol. sampler: Weight of clean filter = 5.00 g, Weight of the filter after exposure for 24 hours = 5.38 g, Average air flow = 2000 m³ in 24 hours.   

A nozzle at standard sea level pressure has two water manometers measuring the static pressure at two points 1 and 2. The upstream diameter D1 is 8 in and the downstream diameter D2 is 2 in, respectively. Air flows through the nozzle, and the air and water temperatures are 60◦F. If the upstream manometer has a column height of h1 = 1/32 in and the downstream manometer has a column height of 8.0 in, what is the mass flow rate through the nozzle?

Imagine you are a pipeline company trying to sell a new project to a shipper of oil for a new refinery in Grand Forks. In order to prepare for selling this idea to shippers and hopefully win the contract, you need to calculate the average cost per unit ($/barrel) of oil to ship over this line in the first year; taking into account Capital, Operating and Energy Cost. This is a competitive proposal, so you will want to make sure your price is as low as you can make it!! The refinery is scheduled to take 300,000 barrels per day of Bakken Crude at typical temperures. Pipeline construction costs average $100,000/foot mile. A foot mile is 1 mile of 12 inch pipe. 2 miles of 16” pipe would be 2.6667 foot mile, and so on. The price includes all pipe and installation and is based on using X-42 and schedule 20 pipe. You have the option of increasing the pipe wall thickness to schedule 40 for an additional 10% and schedule 80 for 20% more than schedule 20. You also have the option of increasing the pipe strength to X60 for an additional 10% or X-72 for 20% above X-42. Each pump station will cost $2,000,000 +$2000/hp of pump. The inlet pressure of pumping stations should not fall below 400 psi. Pipeline flows entirely through class I locations except for 10 miles located in a class IV location. You have the option of bypassing the class IV location by running the pipeline an additional 50 miles. Cost of electricity to drive pumps is $.08 per kWh. (1 kW for 1 hour) Annualized Capital costs can be assumed to be an estimated by a fixed charge rate of .15 (meaning it costs 15% of the total project cost each year to cover debt and equity used to finance the construction) The fixed O&M is $0.10 per inch mile The variable O&M is $0.25 per barrel Hint: Partial credit will be awarded based on the following scale: Please note