As a rule, metallic elements act as reducing agents, not as oxidizing agents. Explain. (Hint: Consider the charges on metal ions.) Do nonmetals act only as oxidizing agents and not as reducing agents? Explain your answer.

1. What can you conclude about the dependence of temperature and volume of a gas? 2. What would happen if you had a rigid container that did not expand or contract like the balloon? Would you expect the pressure to rise or fall if heated or cooled?

A rubber ball dropped from 100 cm will bounce back up to about 60 cm. Balls made from polybutadiene, called SuperBalls, bounce back up to about 85 cm. Golf balls, made from cross-linked polybutadiene, bounce back up to 89 cm. What type of polymer are all three balls made of? Which kind of ball exhibits the property of this type of polymer to the greatest […]

Let f(x) = ? ???? ???? 1 if -L 2 < x < L 2 , 0 if L 2 < x < 3L 2 and extend periodically f by f(x + 2L) = f(x). Find the Fourier series for f and determine where it converges.

Consider a patient (let’s call her A) with end-stage renal disease, who has been on the waiting list for a kidney for several years. She has no family members with kidneys that are immunological matches, so she is waiting for a kidney from an organ donor. Getting a new kidney would considerably improve A’s life, so she is willing to pay a considerable sum – […]

A.An investment project yields a revenue stream of £100 per year for 10 years. The cost of the project is £500. Supposing the pay-back period is four years, would you accept this project? What is the NPV if the discount rate is 10 per cent? What is the IRR? B. Considerable resources are spent by the statistical authorities in deriving estimates of GDP. From a […]

The city of Taiyuan in North China is looking to the market to help solve its air pollution problem. With nine times the air pollution level considered safe for humans, Taiyuan is considered one of the most polluted cities in the world. It proposed to introduce emissions trading in order to achieve a 50 per cent decline in sulphur dioxide output in five years. The […]

Two technicians are discussing exhaust check valves used in AIR systems. Technician A says that they are used to prevent the output from the AIR pump from entering the intake manifold. Technician B says the check valves are used to keep the exhaust from entering the AIR pump. Which technician is correct?                  a. Technician A only   b. Technician B only   c. Both Technicians A and […]

Suppose that business travelers and vacationers have the following demand for airline tickets from New York to Boston:       a. As the price of tickets rises from $200 to $250, what is the price elasticity of demand for (i) business travelers and (ii) vacationers? (Use the midpoint method in your calculations.) b. Why might vacationers have a different elasticity from business travelers?

Technician A says that the crankshaft position (CKP) sensor is used by the PCM to determine engine speed (RPM). Technician B says that the camshaft position (CMP) is used by the PCM to determine the timing of the fuel injectors. Which technician is correct?   a. Technician A only   b. Technician B only   c. Both Technicians A and B  d. Neither Technician A nor B