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Which is the main material in a solar cell?
Which of the following is an example of a social need?
Answer:
A
Explanation:
B/ Evaluate e^(πi/2)
You get a result immediately from Euler's formula:
e ^(i π/2) = cos(π/2) + i sin(π/2) = 0 + i * 1 = i
integer awardPoints
integer userTickets
// Program will be tested with 6, 7, 8, and 3.
userTickets = Get next input
// Your solution goes here
Put "awardPoints: " to output
Put awardPoints to output
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may crush siyang iba
Why is using the proper joining technique important? What could go wrong if the wrong joining technique is used?
Answer:
Explanation:
Using the proper technique is incredibly important because it prevents the materials being joined from breaking and/or causing an accident. If the wrong joining technique is used the materials may not hold in place and come apart easily instead. Also, some joining techniques are not meant for some materials and may instead cause the material to become weak and brittle causing it to break apart almost immediately.
Joining describes a technique which is used to merge two or more independent materials together. The use of wrong joining technique or procedure could result in accident.
In engineering construction, the need to join materials together is always needed for so many reasons. Hence, depending on the materials to be merged, welding, soldering and some other techniques may be employed.
Therefore, wrong or inadequate joining may cause these parts to split or breakup, hence causing severe casualty.
Learn more : https://brainly.com/question/19114739
Argue the importance to society of incorporating green building into an engineer’s designs, with at least two examples.
A 100-mm-long strip of metal is stretched in two steps, first to 200 mm and then to 400 mm. Show that the total true strain is the sum of the true strains in each step; in other words, the true strains are additive. Show that, in the case of engineering strains, the strains cannot be added to obtain the total strain.
Answer:
Kindly check the explanation section.
Explanation:
Determine the strain in units in both steps.
For step one, strain = [ final length - Initial length]/ initial length = 200 - 100/ 100 = 1 unit.
For step two, the strain = final length - Initial length]/ initial length = 400 - 200/ 200 = 1 unit.
Total strain for the two steps = 1 unit + 1 unit = 2 units.
Estimation using single step is given below;
400 - 100/ 400 = 0.75.
It can be shown from above that the Engineering strength is Addictive.
The next thing to do is to determine the true strength. This is how it can be proved that the strength is Addictive or not.
b1 + b2 = (200 - 100/100) + (400-200/ 200)
b1 + b2 = 1 + 1 = 2.
b(total) = 400 - 100/100 = v2 - v1/v1.
At a certain location, wind is blowing steadily at 7 m/s. Determine the mechanical energy of air per unit mass and the power generation potential of a wind turbine with 80-m-diameter blades at that location. Also determine the actual electric power generation assuming an overall efficiency of 30 percent. Take the air density to be 1.25 kg/m3.
Answer:
Explanation:
From the information given;
The velocity of the wind blow V = 7 m/s
The diameter of the blades (d) = 80 m
Percentage of the overall efficiency [tex]\eta_{overall} = 30\%[/tex]
The density of air [tex]\rho = 1.25 kg/km^3[/tex]
Then, we can use the concept of the kinetic energy of the wind blowing to estimate the mechanic energy of air per unit mass by using the formula:
[tex]e_{mechanic} = \dfrac{mV^2}{2}[/tex]
here;
m = [tex]\rho AV[/tex]
= [tex]1.25 \times \dfrac{\pi}{4}(80)^2 \times 7[/tex]
= 43982.29 kg/s
∴
[tex]W = e_{mechanic} = \dfrac{mV^2}{2}[/tex]
[tex]= \dfrac{43982.29 \times 7^2}{2}[/tex]
[tex]= 1077566.105 \ W[/tex]
[tex]\mathbf{ =1077.566 \ kW}[/tex]
The actual electric power is:
[tex]W_{electric} = \eta_{overall} \times W[/tex]
[tex]W_{electric} = 0.3 \times 1077.566[/tex]
[tex]\mathbf{W_{electric} =323.26 \ kW}[/tex]
____________ are calibrated to deliver one fixed volume and are ____________ than ______________. Select one: a. Transfer pipets; less accurate; measuring pipets b. Transfer pipets; more accurate; measuring pipets c. Measuring pipets; more accurate; transfer pipets d. None of these answers is correct. e. Measuring pipets; more precise; transfer pipets
Answer:
b. Transfer pipets; more accurate; measuring pipets.
Explanation:
Transfer pipets can be defined as an ungraduated or graduated disposable plastic instrument which are typically used in science laboratories to transfer or deliver liquids that are small in volume (microliters) . Also, they are generally being referred to as chemical
droppers, teat pipets, eye droppers, pasteur pipets, or droppers. It is made up of an ultra-clear long, slender tube with low density polyethylene (LDPE) and an integral molded bulb. The molded bulb allows a fixed volume of the desired liquid to be dispensed (transfered) or aspirated through compression and relaxation.
Hence, transfer pipets are calibrated to deliver one fixed volume and are more accurate than measuring pipets because of its long, slender tube which limits errors.
Transfer pipets are measurement pipets since they are calibrated to provide a specific volume.
Transfer pipets and Measuring pipets
Transfer pipets have been ungraduated as well as graded disposable plastic instruments that were already commonly used during research labs to transmit as well as distribute small-volume liquids.
Combining compression as well as relaxation, the molded bulb permits a set volume of such necessary fluid material to be administered as well as inhaled.
Thus the response above is correct.
Find out more information about transfer pipets here:
https://brainly.com/question/10951729
A 3.0 m thick singly drained normally consolidated clay layer has eo 5 0.89, Cc 5 0.46, and cv 5 3.5 m2 /year. The effective overburden pressure at the middle of the layer is 105.0 kN/m2 . It is proposed to build a large warehouse that is expected to impose a pressure of 50.0 kN/m2 at the ground level.
a. What would the primary consolidation settlement be?
b. If the engineer proposes to preload the site with a pressure of 90.0 kN/m^2, how long should this surcharge be left to ensure there is no postconstruction settlement when the warehouse is built?
Answer:
= 0.9 years ≈ 1 year
Explanation:
A) Determine the primary consolidation settlement
attached below is the detailed solution
primary consolidation = 358.77 mm
B) first calculate the degree of consolidation
looking at the attached graph at u = 46% , Tv = 0.35
using the formula ; Tv = ( Cv*T ) / H^2
where ; Cv = 3.5m^2
Tv = 0.35
H = 3 m ( single drained )
hence T = ( Tv * H^2 ) / Cv
= ( 0.35 * 9 ) / 3.5
= 0.9 years ≈ 1 year
attached below is the remaining part of the solution
What is a chipping hammer used for?
State three things.
Answer:
i hope this helps.
Explanation:
they are used for breaking concrete, can be positioned to break vertical and overhead surfaces, allows precisely chip away only specific areas.
Select three of the prerequisites for becoming a civil engineer.
bachelor’s degree in civil engineering
physics courses
communications courses
professional certification
internship with a Professional Engineer
Thanks!
Answer:
A bachelor's degree
Physics course
professional certification
Answer:
A bachelor's degree
Physics course
professional certification
Explanation:
In a vehicle with front disc brakes, the vehicle pulls to the left when braking. What causes this?
A. Seized left brake caliper piston
B. Collapsed left brake line hose
Guess the output of this code:
print( (3**2)//2 )
Like guess guess or actually solve ?
cause I think its 121
What area would an industrial materials recycler avoid obtaining construction and demolition materials from?
landfills
construction sites
condemned buildings
mines and timber fields
Spray guns atomize liquid true or false?
Answer:
True
Explanation:
Spray gun plays an one of the most important roles in spray finishing as it directs air to atomize the fluid, gives the particles sufficient velocity to reach the product surface, and shapes the pattern/texture. Hope this helps you as much as intended.
Answer: True
Explanation:
The air cap on the spray gun plays an important role in spray finishing as it directs air to atomize the fluid, gives the particles sufficient velocity to reach the product surface, and shapes the pattern.
____________ is the organization that oversees environmental compliance.
Answer:
Environmental Protection Agency (EPA)
Explanation:
Pollution can be defined as the physical degradation or contamination of the environment through an emission of harmful, poisonous and toxic chemical substances.
Environmental Protection Agency (EPA) is the organization that oversees environmental compliance.
In the United States of America, the agency which was established by US Congress and saddled with the responsibility of overseeing all aspects of pollution, environmental clean up, pesticide use, contamination, and hazardous waste spills is the Environmental Protection Agency (EPA). Also, EPA research solutions, policy development, and enforcement of regulations through the resource Conservation and Recovery Act.
Hence, the Environmental Protection Agency (EPA) is the governmental agency set up to ensure that various industries, factories and people comply with laws and regulations concerning the environment.
Answer:
EPA
Explanation:
Water is pumped from a lake to a large storage tank that is 15 m above at a rate of 70 L/s while consuming 15.4 kW of electric power. Disregarding any frictional losses in the pipes.
a. Starting from the conservation of energyequation in the units of Watts, simplify the equation for the case where you want to determinethe mechanical energy added to the water by the pump. Explain why you can eliminate each termyou would not need. The final form of the equation should be in terms of parameters given in a typical problem.
b. Calculate the overall efficiency of the pump-motor unit.
Answer:
Water is pumped from a lake to a storage tank of 15 m above at a rate of 70 L/s while consuming 15.4 kW of electric power. Disregarding any frictional losses in the pipes and any changes in kinetic energy, determine (a) the overall efficiency of the pump-motor unit and (b) the pressure difference between the inlet and the exit of the pump.Explanation:
what is in gorilla glue
Answer:
glue
Explanation:
A___________combines the function of a video camera and a sound recorder.
Answer:
A video camera with onboard storage(whether is a tape or digital memory) will record sound
Which of the following careers have subject-specific skills related to mathematics and data?
Select all that apply.
a. education
b. engineering
c. good service
d. technology
Answer:
Explanation:
Do you mean food service? It's kind of iffy as an answer. It might be handy to understand the chemistry of foods and the technology of refrigeration. That makes food services hard to classify.
Education: no. You can avoid the math and data skills. You don't need them in education. I knew many teachers that had no idea what a computer did.
technology: definitely. There aren't many technologies that make data processing and mathematics unnecessary.
engineering: definitely.
Answer
Engineering
Technology
maybe food services.
The first two for sure.
Elana has opened a new aerobics studio in her area. How might Elana use social media as a market to spread the word about her new studio? Make a list of hashtags that Elana might use to attract interest to her posts.
Answer:
A list of hashtags that will help Elena's aerobic studio are:
Explanation:
#aerobics #aerobicsstudio #workout #gym #fitness #exercise #burnout #dance #lifestyle #healthylifestyle #yoga #motivation #weightloss #slimfit #health #livinghealthy #cardio #cardiohealth #hearthealth #funworkout #cardiodance #fitnessdance #bodybalance #burncalories #hitworkout
A farmer wants to buy a 10 kg bag of fertilizer (organic soil). They have the choice between two merchants. Merchant A sells the 10 kg bag for $10 and the bag indicates that the fertilizer is completely dry. Merchant B sells the 10 kg bag for 8$, and the bag indicates that the fertilizer has a water content of 20%. If the farmer can only use the solid constituents of the bag, which merchant has the better deal?
Answer:
Since the farmer wants to buy a 10 kg bag of fertilizer, he should buy it from merchant A. However, Merchant A and B are selling at the same price for a unit value. In other words, Both Merchant A and B are selling 1kg of dry fertilizer for $1.
Explanation:
Which merchant has the better deal means which merchant offers the farmer a better deal.
For Merchant A, 10 kg bag = $10
meaning it contains a real 10 kg bag of dry fertilizer which the farmer can use without losing any Kg to drying.
While for Merchant B, 10 kg bag = $8
where the 10kg = 80% dry fertilizer + 20% water content
But the farmer can only use the solid constituents of the bag which means,
Merchant B is giving 80/100 x 10Kg of dry fertilizer for $8
That is, 8kg for $8
Since the farmer wants to buy a 10 kg bag of fertilizer, he should buy it from merchant A. However, Merchant A and B are selling at the same price for a unit value. In other words, Both Merchant A and B are selling 1kg of dry fertilizer for $1.
In a hydroelectric power plant, 65 m3/s of water flows from an elevation of 90 m to a turbine, where electric poweris generated. The overall efficiency of the turbine–generator is84 percent. Disregarding frictional losses in piping, estimate the electric power output of this plant.
Answer:
Electric power output of this plant is [tex]48.192\times 10^{6}\,W[/tex].
Explanation:
From First Law of Thermodynamics we understand that hydroelectric power plant transforms mechanical energy from fluid into electric energy. The power output of this plant ([tex]\dot W[/tex]), measured in watts, is determined by this expression, which is derived from definition of mechanical energy and energy efficiency:
[tex]\dot W = \eta \cdot \rho\cdot g\cdot H \cdot \dot V[/tex] (1)
Where:
[tex]\eta[/tex] - Energy efficiency, no unit.
[tex]\rho[/tex] - Density, measured in kilograms per cubic meter.
[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.
[tex]H[/tex] - Fluid column, measured in meters.
[tex]\dot V[/tex] - Volume flow, measured in cubic meters per second.
If we know that [tex]\eta = 0.84[/tex], [tex]\rho = 1000\,\frac{kg}{m^{3}}[/tex], [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], [tex]H = 90\,m[/tex] and [tex]\dot V = 65\,\frac{m^{3}}{s}[/tex], then the estimated electric power output of this plant is:
[tex]\dot W = (0.84)\cdot \left(1000\,\frac{kg}{m^{2}} \right)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot \left(90\,m\right)\cdot \left(65\,\frac{m^{3}}{s} \right)[/tex]
[tex]\dot W = 48.192\times 10^{6}\,W[/tex]
Electric power output of this plant is [tex]48.192\times 10^{6}\,W[/tex].
Select the four areas in which environmental engineers assist manufacturers with making decisions.
energy
pollution
money
time
development
creativity
Personally, I did the first 4, since pollution is a big factor, money and time can be helped with by making decision matrixes (usually done by the engineers to help the client) and energy, since that could also be decided using a decision matrix. Thank you for your help!
Answer:
In my opinion, Energy, Time, Money and Development
Answer:
Pollution, time, money, and energy.
Explanation:
An ideal Rankine cycle with reheat uses water as the working fluid. The conditions at the inlet to the first-stage turbine are p1 5 2500 lbf/in.2, T1 5 10008F. The steam is reheated at constant pressure p between the turbine stages to 10008F. The condenser pressure is 1 lbf/in.2 (a) If p/p1 5 0.2, determine the cycle thermal efficiency and the steam quality at the exit of the second-stage turbine.
Answer:
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Explanation:
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What is the minimum recommended safe distance from an X-ray source?
The preparation of a formal SEMP is usually a required portion of a contractor’s proposal for a competitive system development program. Since at this time the system design is still in a conceptual state, explain where you would get the information to address the elements of a typical SEMP as listed in this chapter.
Answer:
hello you question lacks the listed options hence i will give you a general answer
answer :
Information can be gotten from : living document and product engineering and RMA engineering
Explanation:
SEMP ( system engineering management plan ) is a plan laid out to enable communication between the project management team in a project and the engineering team working on the project .
The information to be used to address the elements of a typical SEMP at the conceptual stage can gotten from the living document and it will continue to be improved on as the project frame work continues to expand gradually also Information to address the elements of a typical SEMP can be gotten from product engineering and RMA engineering because an SEMP is based on several engineering process
Question 5(Multiple Choice Worth 2 points)
The is the amount of time that the camera lets light in to create the photograph.
Aperture
Sensor time
Shutter speed
Power release
Answer:
I believe it is sensor time
How many horsepower in 337 cc engine
Answer:
11.0 HP
Explanation: