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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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You specialize in analyzing pharmaceutical companies. Tomorrow, the FDA is going to make an announcement about the approval of a
pshichka [43]

Answer:

$ 40

Explanation:

Given :

Bid price = $ 50

Ask price = $ 50.2

Ideal price = $\frac{\text{bid price + ask price}}{2}$

                 $=\frac{50+50.2}{2}$

                = $ 50.1

This is the ideal price of the stock that is based on the mid point price.

The transactional cost for the buy is  = Ask price - ideal price

                                                             = 50.2 - 50.1

                                                             = $ 0.1

Thus we have to give $ 0.1 as the transactional cost if we want tot buy the stock immediately, so that we buy it more than the ideal price.

Therefore, the transactional cost for the sales is = ideal cost - bid cost

                                                                                 = $ 50.1 - $ 50

                                                                                 = $ 0.1

Thus we have to pay $ 0.1  as the transactional cost if we want to sell the stock now, so as to sell it cheaper than the ideal price.

We known the quantity = 200

So the round up transactional cost = $\text{quantity}\times \text{transactional cost(buy)+transactional cost(sale)}$

= 200 x (0.1 +0.1)

= $ 40

4 0
3 years ago
A firm sells a product in a perfectly competitive market. The marginal cost of the product at the current output level of 1,000
Sergio039 [100]

Answer:

The correct answer is "Continue producing 1000 units"

Explanation:

(In a perfect market)

When the price is = marginal cost. This means that if you increase your production, the benefits-profits will be the same as if you produce the same quantity.

When the Price > Marginal cost, means that consumers demand more for that good, so the producer has an incentive to increase the supply

When the Price < Marginal cost, means that production is higher than the consumer's demand.  This is an incentive to decrease the supply.

For this case, the best option is to continue producing the same quantity of units, 1000 units

8 0
3 years ago
A policy that provides coverage for losses over an extended period of time up to a maximum benefit limit is known as a(an):
Tom [10]

Answer:

A policy that provides coverage for losses over an extended period of time up to a maximum benefit limit is known as Lifetime Limit Policy.

Explanation:

This policy is also know as Lifetime Maximum Benefit or Maximum Lifetime Benefit Policy where an insured individual will get paid the maximum amount of any health plan during his entire lifetime.

This policy has proved much beneficial for the people because they get a sign of relief without any kind of worry, if their medical treatment exceeds their allocated or allowed limit.

These policies particularly are limited only to the essential medical services,  but here it needs to be defined what does this essential services means. Because the services considered as essential by one person might not be of the same importance for another person.

4 0
4 years ago
Miguel is 25 years old, has low financial health, a long time horizon and a high risk
arlik [135]

Answer:

A. 85% stocks and 15% bonds/cash equivalents.

Explanation:

Being that Miguel is 25 years old, he has a very long time horizon over which his investments can grow. The fact that he has a low financial health means that he needs to adopt an aggressive investment strategy and that complements his high tolerance for risk. Investing majority of his assets should be in stocks since stocks are riskier than bonds and a small proportion in the latter. Therefore, 85% in stocks and 15% in stocks and cash equivalents would be ideal.

7 0
3 years ago
The Gardner Company, a client of your firm, has come to you with the following problem. It has three clerical employees who must
Oksanka [162]

Answer:

TL;DR   SOme company wanna make stuff

Explanation:

you are welcome

8 0
4 years ago
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