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S_A_V [24]
3 years ago
12

A mining company plans to improve the infrastructure in a location to start mining activities. The company calculated the costs

and earnings listed below to find out if mining would be economically feasible in the location.
A: Cost of land for mining
B: Cost of equipment
C: Cost of labor
D: Miscellaneous costs related to mining
E: Cost of reclamation
F: Earnings from selling the resulting mineral

How can the mining company best decide whether mining activities in the location would be economically feasible?

Select one:
a. by confirming that F is greater than A + B + C + D + E
b. by confirming that D is greater than A + B + C + E + F
c. by confirming that B is lesser than A + C + D + E + F
d. by confirming that C is lesser than A + B + D + E + F
Physics
1 answer:
vfiekz [6]3 years ago
5 0
To decide whether any project is economically feasible or not, the profit from selling the product needs to be greater than the cost of actually producing or making the product.

In the given question, our project is mining. 
The total costs for the project = A + B + C + D + E
The total profit for the project = F

Therefore, to verify that the project is economically feasible, the profit (F) needs to be greater that the cost (A + B + C + D + E)

Based on the above, the best choice would be:
<span>a. by confirming that F is greater than A + B + C + D + E</span>
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Alecsey [184]

Answer:

Current amplitude, I = 5.57 A

Explanation:

It is given that,

Effective resistance, R = 22 ohms

Inductive reactance, L = 72 ohms

Voltage of the alternating source, V = 420 volt

The total impedance of the RL circuit is given by :

Z=\sqrt{R^2+L^2}

Z=\sqrt{(22)^2+(72)^2}

Z = 75.28 ohms

From Ohm's law,

V=I\times Z

I=\dfrac{V}{Z}

I=\dfrac{420}{75.28}

I = 5.57 A

So, the current amplitude of the electric motor is 5.57 A. Hence, this is the required solution.

6 0
4 years ago
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Galina-37 [17]

Answer:

In physics, motion is the change in the position of an object over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time. The motion of a body is observed by attaching a frame of reference to an observer and measuring the change in position of the body relative to that frame.

- Sophia

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3 years ago
Humpback whales are known to produce a collection of elaborate and repeating sounds with frequencies starting at 20 Hz. The soun
jasenka [17]

Answer:

70 m.

Explanation:

Given,

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speed of sound, v = 1400 m/s

wavelength of the waves = ?

we know,

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\lambda= \dfrac{1400}{20}

\lambda=70\ m

Hence, the wavelength of the wave is equal to 70 m.

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A baseball traveling at 100 mph has more kinetic energy than a baseball traveling at 50 mph because the kinetic energy = 1/2 x mass x velocity. Since the baseballs should have the same mass, the velocity is what will determine which ball has more kinetic energy. Since the 100 mph baseball has a higher velocity than the 50 mph baseball, it has more kinetic energy.
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