Rank the following material combinations from highest to lowest risk of galvanic corrosion. (Show your reasoning)

a) Copper with iron

b) Titanium with tantalum

c) Cobalt with gold

d) Cobalt with titanium

e) Chromium with tantalum

f) Titanium with stainless steel

Attempts:  

11

          Keep the Highest:   

1 / 3

• How does income distribution effect consumption in the U.S.? Which income group would have the highest marginal propensity to consume? Should something be done to make income distribution more equal? Should there be a living wage? Do you agree or disagree with Professor Reich's view on income inequality? How would a more equitable income distribution affect aggregate demand?

1)The welding process with highest power density is: a) Electron beam welding. b) Plasma welding. c) Excimer laser welding. d) Shielded metal arc welding.

2) Welding 1015 and 1010 steels using CO2 laser: a) It is harder to weld the 1010 because of its low hardness. b) It is harder to weld the 1015 because of its low hardness. c) It is harder to weld the 1010 because of less prone for cracking. d) It is harder to weld the 1015 because of more prone for cracking.

3) Find the incorrect sentence from: a) Weldment melts and joins in fusion welding. b) Weldment melts and joins in solid state welding. c) Weldment melts and joins in brazing. d) Weldment melts and joins in friction welding.

4) When welding thin aluminum sheets with laser, the weldment should be: a) Positive b) Negative c) Either positive or negative d) None of the above

5) When using YAG laser to produce a lap joint of two steel sheets, the melt starts at: a) Top of the sheets. b) Between the sheets. c) Bottom of the sheets. d) None of the above.

6) In brazing, the base metals melt at temperatures above 840F (450C) while in soldering they melt at 840F (450C) or below a) true b) false

7) Which one of the following AW processes uses an electrode consisting of continuous consumable tubing containing flux and other ingredients in its core a) FCAW b) GMAW c) GTAW d) SMAW

8) Which one of the following arc welding processes uses a non-consumable electrode a) FCAW b) GMAW c) GTAW d) SMAW

9) "Stick" welding is a term sometimes applied when referring to a) FCAW b) GMAW c) GTAW d) SMAW

10) For metallurgical reasons, it is desirable to melt the weld metal with minimum energy input. Which one of the following heat sources is most consistent with this objective: a) high power b) high power density c) low power d) low power density

Other things equal, which of the following bonds has the highest interest rate risk? (Hint: you do not need to do any calculation; just do pair-wise comparisons to determine which one is more sensitive to interest rate changes.)

1. A 10-year, 10% coupon bond issued by the US Department of the Treasury.
2. A 10-year, 20% coupon bond issued by the US Department of the Treasury.
3. A 10-year, 20% coupon bond issued by Microsoft.
4. A 15-year, 10% coupon bond issued by Santander.
5. A 15-year zero-coupon bond issued by the Massachusetts State Government.

The Nash Corp. is considering four investments. Which provides the highest after-tax return for Nash Corp. if it is in the 21% federal tax bracket? Assume the tax rate on dividends is 15%.

• Treasury bonds at 4%

• Preferred stock at 7.5%

• Corporate bonds at 7.5%

• Municipal bonds at 7.25%

5. World Trade In a Global Crisis – (20 pts.) Answer in one paragraph.

a) During this pandemic, does the law of comparative advantage still apply to trade?

b) During this crisis, what has happened to the value of the US dollar on world markets? What are the advantages and disadvantages of this in terms of the trade deficit and foreign travel?  Describe how you would show this trend on a foreign exchange graph.

c) Prior to the pandemic, the US and China were involved in a trade war. In an effort to reduce its trade deficit, the United States decided to slap tariffs on imported steel. Prior to the tariff, Chinese imported steel sold for less than the US domestic price.   Who wins and who loses because of the tariff?

As a foreign exchange trader, how would you react to each of the following news items as it flashes on your computer screen? (Will you sell the foreign currencies you have or buy more foreign currencies?) Explain how the nominal exchange rate will change in each case using the Net Exports-Net Capital Outflows Model.Your score is based on your explanation. Please attach graphs as a Word document or pictures.

a. Mexico’s oil reserves prove to be much smaller than touted earlier.

b. The Social Credit Party wins the national elections in Canada and promises generous expansion of the supply of money and credit.

c. The Japanese government passes a law that will result in a large increase in the taxation of interest payments from Japan to foreigners.

PROGRAMMING IN C-DICE GAME

Q1.

A player rolls two dice at the same time. Each die has six faces, which contain 1, 2, 3, 4, 5 and 6 spots. After the dice have come to rest, the sum of the spots on the two upward faces is calculated.

(i) If the sum is 2 or 10 on the first throw, the player wins.

(ii) If the sum is 3, 7 or 12 on the first throw, the player loses.

(iii) If the sum is 4, 5, 6, 8, 9 or 11 on the first throw, the sum becomes the player’s point. To win, the player must continue rolling the dice until he/she makes the point again. However, the player loses by rolling a 10 before making the point.

An antelope and a cheetah decide to race to a watering hole 1 km
away. The cheetah's top speed is 3x the top speed of the antelope, so the cheetah is condent
she's got the win in the bag. From the starting line, the animals accelerate uniformly to
their top speeds in 10 seconds. After 30 more seconds, the exhausted cheetah stops for a
rest. The antelope is nowhere in the cheetah's sight, so the cheetah decides to take a quick
2-minute nap. Upon waking, the cheetah again accelerates uniformly to her top speed in 10
seconds and crosses the finish line at that speed. If the antelope crosses the finish line in 3
minutes and 10 seconds, who wins the race? Draw a velocity vs time graph for the cheetah's
motion.