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s344n2d4d5 [400]
3 years ago
11

8. True or False? Private companies are involved in the New Space Race.

Engineering
1 answer:
yan [13]3 years ago
5 0
The answer is true. Elon musk has a company called space x
You might be interested in
g A primary sedimentation basin is designed for an average flow of 0.3 m3/s. The TSS concentration in the influent is 240 mg/L.
yarga [219]

Answer:

(a) 0.243 m3/day

(b) 96 mg/l

(c) 0.426 m3/min

Explanation:

The sludge has an average solids concentration of 4 percent and considering TSS concentration in the influent of 240 mg/L then solids in sludge will be 0.04*240= 9.6 mg/L

Considering the average flow of 0.3 m3/s then mass of sludge per day will be given by 0.3*1000*9.6*60*60*24/1000000=248.832 kg/day

To get volume, considering specific gravity given as 1.025 and taking density of water as 1000 kg/m3 then density of sludge is 1025 kg/m3

Volume is mass/density hence 248.832/1025=0.2427629268292 m3/day

Approximately, the volume of sludge is 0.243 m3/day.

(b)

Efficiency of 60 percent is equivalent to 0.6

Efficiency=(influent concentration- flow rate)/influent concentration

0.6=(240-flow rate)/240

Flow rate= 96 mg/l

(c)

Cycle time= 0.243/0.57=0.4263157894736 m3/min

Rounded off, cycle time is 0.426 m3/day

3 0
3 years ago
Can someone write a 2 page essay about Engineering
xxMikexx [17]

Answer:

In the 21st if we are to look around in our society, we will see most of it displays several marvels of engineering, which shows why it is an important discipline. The field of engineering consists of a vast sea of knowledge whose boundary is infinite. And through the discoveries and breakthroughs made by engineers almost every day, the expertise and information keep growing. Society has given engineers various nicknames like problem solvers, organizers, designers, human calculators, and communicators because of the highly creative activities. The most amusing fact about the engineering discipline is that the evidence of its applications dates back to the ancient stone ages. The discoveries made in those primitive days were like the invention of wheels, carts, the building of huts, pulleys, etc.

There has been a significant role in engineering since when human civilization had started. The evidence from ancient Harappa and Mohenjodaro civilizations show that it had a planned layout of the street grids along with equal-sized buildings, structural city division for commercial purposes, well-planned drainage system, etc., which are all considered to be very advanced civil engineering activities for the period of the civilization.As we proceed further down the timeline, we have witnessed several other civil engineering wonders like the great pyramids, Great Wall of China, Taj Mahal, etc. Engineers from places like Japan, where earthquakes are common, found a way to withstand natural disasters by building shock-proof structures, and such inventions have saved a million lives. Ancient Greeks made machines for civilians, military, and as well as commercial purposes.

Transportation is another great wonder in the contributions of engineering made to humankind. Using transportation devices, we have voyaged into outer space and reached the moon as well. And vehicles are such inventions which have certainly made the commute a whole lot easier.

Earlier, the engineering field only consisted of core branches that specialized in individual departments of work, and the divisions were Mechanical, Electrical, and Civil. But eventually, with much more advanced and discoveries in the field of technology and a combination of engineering with other areas of study, some more branches of course under the engineering field became popular. Among them, a few Engineering branches to name are Computer, Aerospace, IT, Electronics and Communication, Electronics and Instrumentation, Biomedical, Chemical, Textile, Petroleum, Food Technology, etc.

In an age where society is highly dependent on technology, especially on electronic devices and the internet, a modern-day software engineer is expected to be tech-savvy and able to solve a range of various problems related to commuting programs. They are also likely to help verify designs and predict structures/devices’ behavior in different environments.

The main objective of engineers and engineering is to benefit humankind by making life and living easier. The contributions of engineering cannot be summed up into a few words. Still, the right way to respect their immense role in society is by recognizing and using their inventions responsibly. Engineering always has and will continue to strive to lift our living standards through sustainable developments and considering conditions to protect our Earth’s environment at all costs.

Explanation:

3 0
3 years ago
9. An embankment having a volume of 320,000 yd is to be constructed from local borrow. The dry unit weight and moisture content
tatuchka [14]

Answer:

correct option is (B) 315,500

Explanation:

given data

volume = 320,000 yd³ = 8640000 ft³

dry unit weight = 106 pcf

moisture content = 18.2%

total unit weight = 122 pcf

moisture content = 16.7%

to find out

volume of borrow lyd needed

solution

first we get here weight of material that is

weight = volume × unit weight

weight = 8640000 ×  122

weight = 1054080000 lb

that weight is weight of water + weight of solid so

0.167 × weight is weight of water + weight of solid ) = 1054080000 lb

and weight of solid = \frac{1054080000}{1.167}

weight of soil solid is = 903239075 pound

and weight of water = 150840925 pound

so volume of soil = 903239075 ÷ 106 lb/ft³ = 8521123.34 ft³

and volume required =  8521123.34 ft³ ÷ 27 ft³ =  315597.161 yd³

volume required = 315500 yd³

so correct option is (B) 315,500

3 0
3 years ago
Determine the resistance of 3km of copper having a diameter of 0,65mm if the resistivity of copper is 1,7x10^8
LUCKY_DIMON [66]

Answer:

Resistance of copper = 1.54 * 10^18 Ohms

Explanation:

<u>Given the following data;</u>

Length of copper, L = 3 kilometers to meters = 3 * 1000 = 3000 m

Resistivity, P = 1.7 * 10^8 Ωm

Diameter = 0.65 millimeters to meters = 0.65/1000 = 0.00065 m

Radius, r = \frac {diameter}{2}

Radius = \frac {0.00065}{2}

Radius = 0.000325 m

To find the resistance;

Mathematically, resistance is given by the formula;

Resistance = P \frac {L}{A}

Where;

  • P is the resistivity of the material.
  • L is the length of the material.
  • A is the cross-sectional area of the material.

First of all, we would find the cross-sectional area of copper.

Area of circle = πr²

Substituting into the equation, we have;

Area  = 3.142 * (0.000325)²

Area = 3.142 * 1.05625 × 10^-7

Area = 3.32 × 10^-7 m²

Now, to find the resistance of copper;

Resistance = 1.7 * 10^{8} \frac {3000}{3.32 * 10^{-7}}

Resistance = 1.7 * 10^{8} * 903614.46

<em>Resistance = 1.54 * 10^18 Ohms </em>

3 0
3 years ago
Que es el crecimiento?
Grace [21]

Answer:

El crecimiento es un concepto que se refiere al aumento de tamaño, cantidad o intensidad de algo. La palabra, como tal, deriva del verbo crecer, que a su vez proviene del verbo latino crescĕre. ... Sinónimos de crecimiento son aumento, incremento, ampliación, expansión. Antónimo de crecimiento es decrecimiento

Explanation:

4 0
2 years ago
Read 2 more answers
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