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Suppose your wealthy aunt has given you a gift of $25,000. You have come up with three options for spending (or investing) the money. First, you'd like (but do not need) a new car to brighten up your home and social life. Second, you can invest the money in a high-tech firm's common stock. It is expected to increase in value by 20% per year, but this option is fairly risky. Third, you can put the money into a three-year certificate of deposit with a local bank and earn 6% per year. There is little risk in the third option. (2.1)
If you decide to purchase the new car, what is the opportunity cost of this choice? Explain your reasoning.
If you invest in the high-tech common stock, what is the opportunity cost of this choice? Explain your reasoning.
suppose a satellite in geosynchronous orbit has just passed above the international space station with respect to the
a room with insulated walls is initially at the outdoor temperature of 21degc. the room contains a 100-w light-bulb a
an internally reversible heat engine operates between the temperatures of 827deg c and 17 deg c and rejects 100 kj min
assume ends of bar in 5-7 have been kept constanst at 100 degrees c for a long time. then at some instant t0 the
What is the approximate height of the water tank needed to cool the spheres from an initial temperature of 360 K to a center temperature of 320 K?
determine the force in members cd and gf of the truss and state if the members are in tension or compresson. also
In an ideal constant pressure cycle, ( is the one in which both, QA as well as QRare at constant pressure ) using air, the overall volume ratio of the cycle is 8:1. Adiabatic compression begins at 2/7th of the compression stroke when the conditions o..
The figure on the right shows an approximated pressure distribution on an airfoil and the direction of incoming flow. Alpha is 10 degrees, the pressure distribution on the top is 3n/m and on the bottom is 1n/m. The chord Length is 1 meter.
Methane (CH4) is mixed with 125% theoretical air and burned.
design a closed-system air-standard gas power cycle composed of three processes and having a minimum thermal efficiency
a gas is contained in a vertical frictionless pixton-cylinder. the piston m 10 kg a- 7.5 x 10-3 m2 is attached to a
The final pressure is 5 kpa . If specific internal energy of the gas decreases by 40 kj/kg, find the heat transfer in magnitude and direction.
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