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1. You have a 16 oz cup of coffee at 180 degrees F. That is way too hot to drink. So you want to cool the coffee off and decide to add some cold water. You add 2 ounces of cold water at 40 degrees F. How much will the water you added heat up? How much will the coffee that you poured the water into cool down?
2. An air bubble at the bottom of a lake has a volume of 15 cm3. The lake is 40 m deep and has a temperature of 4 ºC at the bottom. The bubble then rises to the surface where the temperature is 23 ºC. What is the volume of the bubble just before it reaches the surface?
3. You are sitting behind a curtain watching meters that measure pressure, volume, and temperature of some kind of heat engine. Pressure, volume, and temperature have reached an equilibrium state. Then someone behind the curtain tells you that they are going to add energy to the system. The energy is added and the equilibrium changes. Can you tell whether they did work on the system, heated the system, or a combination of both? Explain your answer.
4. In a refrigerator, heat is transferred from a colder area (the inside of the refrigerator) to a warmer area (the air outside of the refrigerator). Given what you know about internal energy, explain how this is possible.
Problem 1: Given the tabulated cut/fill data below, calculate the net cubic yards of excavated materials. Neglect soil type, water content, shrinkage, & swellage.
Review the published Code of Ethics for each of the following major engineering professional organizations:
Carbon dioxide enters an adiabatic nozzle at 1200 K with a velocity of 50 m/s and leaves at 400 K. Assuming constant specific heats at room temperature, determine the Mach number (a) at the inlet and (b) at the exit of the nozzle.
Evaluate the basic methods employed when taking measurements and acceptable values - Demonstrate the interrelationship between the factors affecting thermal comfort and the waythey are combined to obtain the PMV and PPD
What is the difference between a fixed effects model and random effects model? Explain the concept of interaction between factors. What are the features of a 2k and 2k-2 experiments and how is it constructed
The pin is pulled, releasing the piston, and both rooms come to equilibrium at 30°C and as the water is compressed it becomes two-phase. Considering a control mass of the air and water, determine the work done by the system and the heat transfer t..
Define the nodes, what they represent, and node values and define the arcs, arc costs, arc capacities if any.
How much gasoline do vehicles with the following fuel efficiencies consume in one year? Calculate the gasoline savings, in gallons per year, created by the following two options. Show all your work, and draw boxes around your answers.
Analyze heat lost from a 6-inch OD steam line. The line carries high-pressure steam throughout the factory at 400 psi, 400 oF. Specify type and thickness for insulating the steam line.
Gene Technology
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modify the airline terminal problem by adding agent breaks. the 16 hours are divided into two 8-hour shifts. agent
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