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trapecia [35]
3 years ago
15

The costs of mining and transporting coal are roughly independent of the heating value of the coal. Consider:

Engineering
1 answer:
Paul [167]3 years ago
5 0

Answer:

2

Explanation:

You might be interested in
Consider the time domain waveforms below on the left. Match waveforms (a) - (e) to their respective frequency spectrum represent
lozanna [386]

Answer:

(a) ------(3). (b)------(1) (c)-----(5) (d)------(2) ------ (e) -----4

Note: Kindly find an attached copy of the diagram associated with the solution to the question below.

Sources: the diagram to this question was researched from Quizlet

Explanation:

Solution

(1) Part (a)a waveform has a high frequency components compared to another waveform. the corresponding frequency components should be high.

So for the wave form a  the corresponding frequency spectrum is (3)

(2) For part (b), waveform has three harmonics, the corresponding frequency spectrum is (1)

(3) The time domain waveform plot (c) is a sine wave but there exists a dc component.

Thus x[0] ≠0

For (c) the corresponding frequency spectrum is (5)

(4) For part (d) the corresponding frequency spectrum is (2)

(5) A sine wave is made of a single frequency only and its spectrum is a single point

For (e) the corresponding frequency spectrum is (4)

3 0
3 years ago
What does the branch of physics include
cricket20 [7]

Answer:

The branches of physics are;

  • Classical physics
  • Modern physics
  • Nuclear physics
  • Atomic physics
  • Geophysics
  • Biophysics

Explanation:

Physics is a branch of science that studies nature, properties of matter and energy. The subjects in study are; mechanics, light, heat, light, sound, electricity, properties of atoms and magnetism.

The common branches are;

  • Thermodynamics which that studies heat, how it is transferred and effects
  • Sound that studies production, properties and application of sound waves
  • Light that deals with properties,pysical aspects and objects that utilize light
  • Electricity and magnetism that studies charges, their effects and relation with magnetism
  • Classical physics that studies laws of motion and gravity
  • Modern physics that study theory of relativity and quantum mechanics
4 0
3 years ago
Which of the following are not related to a materials structure? (Mark all that apply) a)- Atomic bonding b)- Crystal structure
belka [17]

The answer is c) atomic number

3 0
3 years ago
You have the assignment of designing color codes for different parts. Three colors are used on each part, but a combination of t
Masja [62]

Answer:

7 available

Explanation:

Since 3 colors are available r = 3

Total combination = 35

nCr = 35 ---1

nCr = n!/(n-r)!r!---2

We put equation 1 and 2 together

n-1)(n-2)(n-3)!/n-3)! = 35x 3!

We cancel out (n-3)!

(n-1)(n-2) = 210

7x6x5 = 210

nC3 = 35

7C3 = 35

So If there are 35 combinations, 7 colors are available.

Thank you!

3 0
3 years ago
What is the minimum number of crewmembers needed when using laser plane equipment?
Goshia [24]

Answer:

two

Explanation:

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8 0
3 years ago
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