In 1859 two Frenchmen built the first machine-powered submarine. What powered the engine?

pistons
force
turbines
pressure

Asbestos may cause cancer by inhalation. Moreover, asbestos is also known to cause different respiratory diseases (especially asbestosis) by affecting the mucosa of the bronchi.

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Answer:

False

Explanation:

The concentration of chloride ions in the solution can be calculated by using the Nernst equation.

The Nernst equation is used to calculate the potential of an electrochemical cell under non-standard conditions. It relates the electrode potential to the concentrations of the species present in the solution.

The Nernst equation is:E = E° - (RT/nF) ln(Q)where, E is the cell potential under non-standard conditions,E° is the standard electrode potential, R is the gas constant, T is the temperature, n is the number of moles of electrons transferred, F is the Faraday constant, and Q is the reaction quotient.In this case, the standard cell potential (E°) is 0.115 V, and the measured cell potential (E) is 0.0925 V.

The reaction is given as:2AgCl(s) + 2e- → 2Ag(s) + 2Cl-(aq)We can see that n = 2 (two electrons are transferred in the reaction).The Nernst equation can be rearranged to solve for the concentration of chloride ions (Cl-) in the solution:ln(Cl-) = (E° - E)/(0.0592/n)ln(Cl-) = (0.115 - 0.0925)/(0.0592/2)ln(Cl-) = 0.378M[Cl-] = e^0.378M[Cl-] = 1.46 MTherefore, the concentration of chloride ions in the solution is 1.46 M.

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Fine grained of alkali igneous rocks cannot be used in cement because of the volume expansion caused by the Alkali-silica reaction, fine-grained igneous rocks cannot be used as aggregates in cement.

Extrusive igneous rocks have a fine-grained or aphanitic texture, with grains that are too small to see without a magnifying glass. The fine-grained texture suggests that the rapidly cooling lava did not have enough time to form large crystals. A petrographic microscope can be used to examine these tiny crystals.

The texture of an igneous rock (fine-grained vs coarse-grained) is determined by the rate at which the melt cools: slow cooling produces large crystals, while fast cooling produces small crystals.

The chemical reaction that occurs in both alkali cations and hydroxyl ions in the pore solution of hydrated cement paste and certain reactive silica phases present in concrete aggregates is known as the alkali-silica reaction (ASR).

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Answer:

a). 5 cylinders

b). 3 cylinders

Explanation:

To develop a gasoline engine that produces

Power, P = 300 hp

               = 300 x 746 = 223710 watt

at speed, N = 600 rpm = 100 rps

and stroke volume \($V_s=0.5$\) L

                                   = \($0.5 \times 10^{-3}\ m^3$\)

a). A naturally aspirated engine

BMEP at peak power = 10 bar

                                    = \($10 \times 10^5\ N/m^2$\)

Suction volume, V = \($V_s \times N$\)

                           = \($0.5 \times 10^{-3} \times 100 = 0.05\ m^3/s$\)

Power produced in one engine cylinder , p = BMEP x V

                                                                        = \($10 \times 10^5 \times 0.05$\)

                                                                        = 50000 watts

No. of cylinders required, n = \($\frac{P}{p}$\)

                                              = \($\frac{223710}{50000}$\)    

                                             = 4.47

So number of cylinders ≈ 5 nos.

b). A turbo charged engine

   BMEP = 20 bar = \($20 \times 10^5\ N/m^2$\)

   and Volume V = \($0.05\ m^3 /s$\)

Power produced in one engine cylinder, p = BMEP x V

                                                                       = \($20\times 10^5 \times 0.05$\)

                                                                       = 100000 watts

Therefore, number of cylinders, n = \($\frac{P}{p}$\)

                                                        = \($\frac{223710}{100000}$\)

                                                        = 2.23

So number of cylinders ≈ 3 nos.

Solution :

The correct size of the arc of a welding process depends upon the application and the electrode. As a rule, the arc length should not be more than a diameter of the core of the electrode.

As for the electrode of diameter size of 5/32" or 4 mm, the arc length should be more than its core diameter. Also for 5/32 " diameter electrode, the welding time for the one electrode must be one minute as well as the length of the weld be the same as the length of the electrode consumed.  

Fiscal policy is the use of government spending and taxation to influence the economy. It involves decisions made by the government regarding how much money should be spent on public goods and services, such as education, healthcare, and infrastructure, and how much revenue should be collected through taxes.

Fiscal policy is often used to promote economic growth and stability, such as during a recession when the government may increase spending to stimulate the economy. However, it can also be used to combat inflation by reducing government spending and increasing taxes.

Fiscal policy is defined as the use of government revenue collection (taxation) and expenditure (spending) to influence the economy. It is a tool utilized by the government to achieve economic objectives, such as promoting growth, managing inflation, reducing unemployment, and maintaining a stable balance of payments. Fiscal policy can be adjusted through changes in tax rates, government spending, and public debt management, depending on the economic goals and prevailing conditions.

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Answer:

Engineering law and ethics are the moral codes associated with the field in which engineers are meant to adhere strictly to.

These ethics help in the safety of the engineers as a result of wearing protective clothing being a part of the ethics . Accuracy should also be taken important in research and daily activities. Corrupt practices and activities which poses risk to the environment is also strictly prohibited.

Answer:

A tunnel built in soft ground—such as clay, silt, sand, gravel or mud—requires specialized techniques compared to hard rock, to compensate for the shifting nature of the soil.

It's from web...

Soft ground tunneling describes the additional measures needed when Microtunneling through soil conditions that are vulnerable to collapse. ... This process ensures tunneling can happen effectively in soft grounds.

It's from me...

The latter method, fluorescently labeled dideoxyribonucleoside triphosphates (ddNTPs), is more useful than end-labeled primers for Sanger sequencing.

It is because Fluorescently labeled ddNTPs are utilized to detect DNA synthesis during Sanger sequencing. Fluorescently labeled ddNTPs have four various color signatures, which are used to distinguish the four bases in DNA (adenine, guanine, cytosine, and thymine). End-labeled primers are only capable of detecting one base at a time, whereas fluorescently labeled ddNTPs can detect all four bases simultaneously. As a result, Sanger sequencing utilizing fluorescently labeled ddNTPs allows for the generation of lengthy reads and increased speed than end-labeled primers.

Sanger sequencing is a technique used to determine the nucleotide sequence of a DNA fragment. It employs a DNA polymerase enzyme, a template DNA strand, and dideoxynucleotides (ddNTPs) that terminate DNA synthesis. Sanger sequencing necessitates a template DNA strand, a DNA polymerase enzyme, and dideoxynucleotides (ddNTPs) that terminate DNA synthesis. Sanger sequencing may be done with either end-labeled primers or fluorescently labeled ddNTPs.

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Answer:

The main distinction between the Iron Age and the Bronze Age is that during the Iron Age, iron was discovered and refined, allowing for the production of lighter and stronger metal tools. This enabled major advances in agriculture, animal domestication, and the overall development of societies, as people were able to settle in agricultural communities more permanently.

Explanation:

Answer:

A) Discovery and refinement of metals was revolutionary.

Explanation:

Answer:

D. Field theory.

C) No, because a central assumption of the chart would be inaccurate.

The accuracy of a chart that specifies only the outdoor ambient temperature relies on the assumption that the indoor relative humidity is around 50 percent. If the indoor relative humidity deviates significantly from 50 percent, the chart's accuracy would be compromised. The relationship between temperature, relative humidity, and other factors affects the performance and comfort levels of a space, so a deviation from the assumed conditions would render the chart inaccurate.

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Total annual inventory cost for the 26 parts is 196.6

The cost of purchasing, ordering, and storing inventory is added together. TC is the total cost and is calculated as follows: TC = PC + OC + HC, where PC stands for purchase cost, OC for ordering cost, and HC for holding cost.

The sum of the regular cost and the supplemental yearly cost is referred to as the total annual cost.

PC is the purchase cost, OC is the ordering cost, and HC is the holding cost.

TC = PC + OC + HC,

1.60 + 75+ 120 = 196.6

Total annual inventory cost for the 26 parts is 196.6

The given production schedule feasible for a one shift operation.

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A prefix expression is an expression where the operator comes before the operands. It is evaluated by starting from the left and performing the operation specified by each operator.

The prefix expression "+3+313 333" can be evaluated as follows:

The operator "+" is encountered.

The next operand is "3". The current result is 3.

The operator "+" is encountered again.

The next operand is "3". The current result is added to 3, resulting in 6.

The operator "+" is encountered once more.

The next operand is "313". The current result is added to 313, resulting in 319.

The final operand is "333". The current result is added to 333, resulting in 652.

Therefore, the value of the prefix expression "+3+313 333" is 652.

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You get a result immediately from Euler's formula:

e ^(i π/2) = cos(π/2) + i sin(π/2) = 0 + i * 1 = i

Flashings used in masonry cavity walls can be made of each of the following materials except wood.

Flashings are essential components in masonry cavity walls, designed to prevent water penetration. They can be made from various materials, such as stainless steel, copper, aluminum, lead, and synthetic materials like PVC and EPDM. However, wood is not suitable for flashings, as it lacks the required durability, waterproofing, and corrosion-resistant properties needed for long-term protection against water ingress.

To ensure the effectiveness and longevity of flashings in masonry cavity walls, avoid using wood and opt for materials such as stainless steel, copper, aluminum, lead, or synthetic materials.

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Answer:

Typically, diesel trucks cost more than those with gas engines, especially when you're first buying them, as diesel is usually featured as an add-on for gas-powered cars. Diesel add-ons can cost over $5,000 for midsize trucks and around $10,000 for heavy-duty trucks.

Explanation:

Make me brain pls

Answer:

The IT function manages the entire information technology value chain within the organisation. It provides solutions with regard to the software and hardware IT infrastructure. We have a locally developed software which forms the frame work upon which our business rests.

Explanation:

hope it helps.

Answer:

Vgr = 0.122 = 12.2 vol %

Explanation:

Density of ferrite = 7.9 g/cm^3

Density of graphite = 2.3 g/cm^3

compute the volume percent of graphite

for a 3.9 wt% cast Iron

W∝ =  (100 - 3.9) / ( 100 -0 ) = 0.961

Wgr = ( 3.9 - 0 ) / ( 100 - 0 ) = 0.039

Next convert the weight fraction to volume fraction using the equation attached below

Vgr = 0.122 = 12.2 vol %

The was a brand-new political party established by "Know-Nothings." Canal boats were able to handle far greater goods when compared to turnpike traffic.

The act of transporting people, animals, and/or objects from one location to another is known as transport in American and British English. Transportation can be accomplished by air, land (by train and by road), water, cable, pipeline, and space. The field is made up of operations, transportation, and infrastructure. Transportation enables human trade, which is vital for the development of civilizations.

Along with terminals like airports, railway stations, bus stops, warehouses, trucking terminals, and refueling depots, fixed installations include roads, railways, airways, rivers, canals, and pipelines (including fueling docks and fuel stations).

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Answer:

if user_tickets == 7:

  award_points = 1

else:

  award_points = user_tickets

Explanation:

Not sure what language you are using. But this can be used for python. Also don't know if you are required to ask the user for any input

Answer:

HUHHHHHH BE SPECIFIC CHILE

Explanation:

ERM IRDK SORRY BOUT THAT

Answer: the shear strength at a depth of 12 ft is 1034.9015 lb/ft²

Explanation:

Given that;

Weight of soil r = 118 lb/ft³

stress parameter C = 250 lb/ft²

φ total = 29°

depth Z = 12 ft

The shear strength on a horizontal plane at a depth of 12ft

ζ = C + δtanφ

where δ = normal stress

normal stress δ = r × z = 118 × 12 = 1416

so

ζ = C + δtanφ

ζ = 250 + 1416(tan29°)

ζ = 250 + 1416(tan29°)

ζ = 250 + 784.9016

ζ = 1034.9015 lb/ft²

Therefore the shear strength at a depth of 12 ft is 1034.9015 lb/ft²

Answer: Not Enough Time

Often, the deadline date is decided before the project starts and is non-negotiable. This deadline results in a headlong rush to get started on the assumption, the sooner you begin coding, the sooner you'll finish.

A rush to start coding is almost always the wrong approach. It is important to spend the time to create a good design. Not having a good design leads to continuing changes throughout the development phase. When this happens, time and budget are consumed at a rapid rate.

Solution: Make time to create a good design. Don't be tempted to jump straight in and begin coding. Assign time to this task and the rest of the project will run much better. It will improve your reputation when you deliver something that fulfils the customers' expectations and works the first time correctly.

Explanation:

The reasons for a successful and unsuccessful software project is clear objectives and specifications and poor communication between the client and team respectively.

A software project is an entire process of developing software, from gathering requirements to testing and maintenance, carried out in accordance with execution techniques over a predetermined amount of time to produce the desired software output.

Project success is the accomplishment of something wanted, planned, or attempted, while project failure is a "project that fails to execute a duty or. an expected action, non-occurrence, or non-performance." Success is also defined as an action that achieves its intended goal.

Therefore, clear objectives and requirements and inadequate customer and team communication are the causes of successful and failed software projects, respectively.

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