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borishaifa [10]
3 years ago
7

The 9-inch-long elephant nose fish in the Congo River generates a weak electric field around its body using an organ in its tail

. When small prey (or even potential mates) swim within a few feet of the fish, they perturb the electric field. The change in the field is picked up by electric sensor cells in the skin of the elephant nose. These remarkable fish can detect changes in the electric field as small as 3.0 μN/C. (a) How much charge (modeled as a point charge) in the fish would be needed to produce such a change in the electric field at a distance of 75 cm? (b) How many electrons would be required to create the charge?
Business
1 answer:
Anastaziya [24]3 years ago
4 0

Answer:

(a) 1.88*10^-16 C. (b) 1172 electrons

Explanation:

An electric field (E) can be defined as a space surrounding a charged object (Q) that exerts force on all charged particles around the object. Mathematically:

E = \frac{kQ}{d^{2} }  

Where: E is the electric field = 3*10^-6 N/C, d is distance = 0.75 m and k is the proportionality constant = 8.99*10^9 N*m^2/C^2.

Thus:

(a) Q = E*d²/k

Q = (3*10^-6)*(0.75²)/8.99*10^9 = 1.88*10^-16 C

(b) An electron has a charge of 1.602*10^-19 C. Therefore, the number of electrons that would need 1.88*10^-16 C is (1.88*10^-16)/(1.602*10^-19) = 1171.7 . That is approximately 1172 electrons.

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Quickie Inc., a perfectly competitive firm, currently maximizes profit by producing 400 units of output. If its marginal cost is
jeka94

Answer:

economic profit = $2000

Explanation:

given data

currently maximizes profit = 400 units

marginal cost = $25

average total cost = $20

to find out

earning economic profit

solution

first we get here Total revenues that is express as

Total revenues = currently maximizes profit  × marginal cost

Total revenues =  400 ×  $25

Total revenues = $10000

and Total cost will be

Total cost = currently maximizes profit  × average cost

Total cost = 400  ×  $20

Total cost = $8000

so economic profit will be

economic profit = Total revenues - Total cost

economic profit = $10,000 - $8,000

economic profit = $2000

8 0
3 years ago
Everything else held constant, an increase in uncertainty on business will_____ the required rate of return on its stock and ___
wlad13 [49]

Answer:

the answer is C

Explanation:

6 0
3 years ago
Suppose there is one firm in a market with linear demand function. The firm has a constant marginal cost of $9. The firm is curr
Paul [167]

Answer:

We employ the fact that Pprofit Maximizing Price = Marginal cost * (ed/ed + 1)

Price = $9 * (-3 / (-3 + 1))

Price = $9 * (-3/-2)

Price = $9 * 1.5

Price = $13.5

As we can see that the profit maximizing price is 13.5. Whereas, the current price of $15 which is not profit maximizing. So the firm should reduce the price to 13.5 per unit so as to be maximizing profit.

4 0
3 years ago
The three main types of markets for financial capital are​ _______.
slavikrds [6]

Answer:

loan​ markets, bond​ markets, and stock markets

Explanation:

If we want to buy and sell financial assets, be it money, bonds or shares, for example, it is necessary that there are so-called financial markets. We can distinguish 3 different types of financial markets, the difference lies in the type of assets that are traded in each of them

<u>Capital markets </u>

In this type of market, stocks, bonds and bonds are traded. If we focus on the national level, we can distinguish several capital markets:

The stock market

Second markets for medium-sized companies

The AIAF private fixed income market

The public debt market (state, autonomous communities, municipalities…)

<u>Currency market  </u>

In it instruments are bought and sold in different currencies. The most notable corresponds to the purchase and sale of spot and forward currencies

<u> Money markets  or loan markets</u>

In these markets, short-term financial assets are traded, these can be interbank deposits, company notes and treasury bills. These types of markets are also called money markets.

7 0
3 years ago
Vern plans to invest $100,000 in a growth stock, in year 0. The stock is not expected to pay dividends. However, Vern predicts t
Sergeu [11.5K]

Answer:

a) $15,347

b) Time period

  • Character

Explanation:

Initial investment = $100,000

Tax payable = ( 135,000 - 100,000 ) * 15%

                     = 35,000 * 0.15 = $5250

Amount receivable after tax = $135,000 - $5250 = $129,570

n  = 3 years

<u>a) Using a 4% discount rate calculate NPV </u>

NPV = 129570 / ( 1 + 0.04 )^3 - Initial investment

        = 129570 / ( 1.04 )^3 - 100,000

        ≈  $15,347

b) The two basic tax planning variables that increases the value of Vern's investment

  • Time period
  • Character
8 0
3 years ago
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