At the equator, the earth’s field is essentially horizontal; near the north pole, it is nearly vertical. In between, the angle varies. As you move farther north, the dip angle, the angle of the earth’s field below horizontal, steadily increases. Green turtles seem to use this dip angle to determine their latitude. Suppose you are a researcher wanting to test this idea. You have gathered green turtle hatchlings from a beach where the magnetic field strength is 50 μT and the dip angle is 56∘. You then put the turtles in a 2.0 m diameter circular tank and monitor the direction in which they swim as you vary the magnetic field in the tank. You change the field by passing a current through a 100-turn horizontal coil wrapped around the tank. This creates a field that adds to that of the earth.
A.) In what direction should current pass through the coil, to
produce a net field in the center of the tank that has a dip angle
of 62∘ ? [ANSWER: CLOCKWISE]
B.) What current should you pass through the coil, to produce a net
field in the center of the tank that has a dip angle of 62∘ ?
Please show step-by-step solution. Thank you!
In: Physics
1) Near the top of the page the word "safety" was used. How is that meant to be interpreted?
firm—cash, marketable securities, accounts receivable, and inventory. In managing cash and marketable securities, the primary concern should be for safety and liquidity—with secondary attention placed on maximizing profitability. As we move to accounts receivable and inventory, a stiffer profitability test must be met. The investment level should not be a result of happenstance or historical determination but must meet the same return-on-investment criteria applied to any decision. We may need to choose between a 20 percent increase in inventory and a new plant location or a major research program. We shall examine the decision techniques that are applied to the various forms of current assets.
2)what does this mean? "The second major reason for holding cash results from the practice of holding balances to compensate a bank for services provided rather than paying directly for those services."
There are several reasons for holding cash: for transactions balances, for compensating balances for banks, and for precautionary needs. The transactions motive involves the use of cash to pay for planned corporate expenses such as supplies, payrolls, and taxes, but also can include planned acquisitions of long-term fixed assets. The second major reason for holding cash results from the practice of holding balances to compensate a bank for services provided rather than paying directly for those services.
3) Precautionary cash balances are primarily used for what?
Holding cash for precautionary motives assumes management wants cash for emergency purposes when cash inflows are less than projected. Precautionary cash balances are more likely to be important in seasonal or cyclical industries where cash inflows are more uncertain. Firms with precautionary needs usually rely on untapped lines of bank credit. For most firms, the primary motive for holding cash is the transactions motive.
In: Finance
The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.7 ppm and standard deviation 1.6 ppm. 38 randomly selected large cities are studied. Round all answers to 4 decimal places where possible.
In: Statistics and Probability
Consider a collection of abandoned buildings near the waterfront of an established Midwestern city in the United States. Under what economic and market conditions might this collection of buildings be an investment opportunity?
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Declining Population locally, but positive national economic outlook (stock prices and mild inflation). |
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Increasing Population and Positive Economic Indicators (growing employment, etc.), and the potential to repurpose the buildings into a new use. |
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Low or negative price inflation in the local real estate market, but income growth in the national economy. |
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All of the above. |
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None of the above. |
Some observers claim that high-speed internet connections will constitute a “Death of Distance” and drive a change in real estate markets between urban areas and more isolated locations. Which of the following best explains how this idea is (and will continue to) impact real estate markets?
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This will lead to increased supply (and reduced price) in cities, and decreased supply (and increased prices) for areas further from cities. |
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This will lead to reduced supply (and increased price) in cities, and increased supply (and reduced prices) for areas further from cities. |
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This will lead to increased demand (and price) in cities, and reduced demand (and prices) for areas further from cities. |
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This will lead to reduced demand (and price) in cities, and increased demand (and prices) for areas further from cities. |
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None of the above. |
In: Economics
The new Fore and Aft Marina is to be located on the Ohio River near Madison, Indiana. Assume that Fore and Aft decides to build a docking facility where one boat at a time can stop for gas and servicing. Assume that arrivals follow a Poisson probability distribution, with an arrival rate of 4 boats per hour, and that service times follow an exponential probability distribution, with a service rate of 8 boats per hour. The manager of the Fore and Aft Marina wants to investigate the possibility of enlarging the docking facility so that two boats can stop for gas and servicing simultaneously.
Note: Use P0 values from Table 11.4 to answer the questions below.
In: Statistics and Probability
The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.8 ppm and standard deviation 1.8 ppm. 37 randomly selected large cities are studied. Round all answers to 4 decimal places where possible.
In: Statistics and Probability
Which factors are thought to influence the development of the
Yuan/$ exchange rate in the near future?
How are these factors related to exchange rate theories?
2. When and how can countries be labeled currency
manipulators?
Does China currently fit this criteria?
In: Economics
The amount of pollutants that are found in waterways near large cities is normally distributed with mean 9.7 ppm and standard deviation 1.8 ppm. 6 randomly selected large cities are studied. Round all answers to 4 decimal places where possible.
In: Statistics and Probability
The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net . Suppose that you loft the ball with an initial speed of 15.0 m/s at an angle of 50.0° the horizontal. At this instant your opponent is 10.0 m away from the ball. He begins moving away from you 0.21 s later, hoping to reach the ball and hit it back at the moment that it is 2.10 m above its launch point. With what minimum average speed must he move? (Ignore the fact that he can stretch, so that his racket can reach the ball before he does.)
In: Physics
In: Economics