Operating a wind tunnel for aircraft experiments begins with adiabatically and reversibly compressing atmospheric air (300 K) into long cylinders comprising a total volume of 20 m3 at 200 bars. The cylinders are initially at 1 bar. Estimate the minimal amount of work required (MJ) to perform the compression step. (a) Write the most appropriate energy … Read more
An insulated cylinder is fitted with a freely floating piston, and contains 0.5 kg of steam at 9 bar and 90% quality. The space above the piston, initially 0.05m3, contains air at 300 K to maintain the pressure on the steam. Additional air is forced into the upper chamber, forcing the piston down and increasing … Read more
Many action movies show gas cylinders that have their caps knocked off. The tanks go flying around wreaking havoc (only on the bad guys, of course). How much velocity could a tank like that really generate? For an upper bound, consider a tank traveling horizontally on a frictionless surface with an isentropic nozzle taking the … Read more
CO2 is given a lot of credit for global warming because it has vibrational frequencies in the infrared (IR) region that can absorb radiation reflected from the Earth and degrade it into thermal energy. The vibration at /k = 290K (903cm–1) is particularly important. (a) Plot Cvig/R versus T for CO2 in the … Read more
We have considered heat and work to be path-dependent. However, if all heat transfer with surroundings is performed using a reversible heat transfer device (some type of reversible Carnot-type device), work can be performed by the heat transfer device during heat transfer to the surroundings. The net heat transferred to the surroundings and the net … Read more
How can deficiency of the fat soluble vitamins affect athletic performance? You can provide research on either strength or endurance related performance. Make sure to discuss how deficiency will show up. For example, what are some of the symptoms an athlete may experience due to a deficiency? Use at least … Read more
Email the paper to me as a Word Doc file, with the file named in this format: your_name_final_essay_intro-modernism Make sure that your name is on the paper and that it also includes a title. If you are going to use lots of images you are welcome to send me the paper in another … Read more
What is desertification?Choose a specific location currently affected by desertification to research (Not a location that has been a desert for a long time. Choose a location currently affected by desertification. Example, if you are looking at the Sahara, the location associated with it currently undergoing desertification would be the outlying Sahel.)Where is it locatedWhat … Read more
Topic: TExamine the basic tenants of identity theory. Where does society play a part in our identity formation and change? Word count: 450-500 Use the following source: Social Psychology: Sociological Perspectives, 3rd ed., by David E. Rohall, Melissa A. Milkie, & Jeffrey W. Lucas
Air is flowing at steady state through a 5 cm diameter pipe at a flow rate of 0.35 mole/min at P = 5 bar and T = 500 K. It flows through a throttle valve and exits at 1 bar. Assume air is an ideal gas with CP = 29.1 J/mol-K. If the throttle valve was … Read more