Answer:
uh because life sucks o_<
Roundabouts have significantly lower crash and fatality rates than intersections.
O True
O False
Answer:
True
Explanation:
Apparently roundabouts reduce injury crashes by about 75%
Solve Problem 1 on a cold air-standard basis with specific heats evaluated at
300 K.
1. An air-standard Otto cycle has a compression ratio of 9. At the beginning of
compression, 1 = 100 kPa and 1 = 300 K. The heat addition per unit mass
of air is 1350 kJ/kg. Determine
(a) the net work, in kJ per kg of air.
(b) the thermal efficiency of the cycle.
(c) The mean effective pressure, in kPa.
(d) The maximum temperature in the cycle, in K.
Answer:
(a) 774.529 kJ/kg
(b) Approximately 61.2%
(c) 96.816 kPa
(d) The maximum in the cycle temperature is 2655.3 K
Explanation:
(a)The temperature T₂ = T₁ × r^(k - 1)
∴ T₂ = 300 × 9^(1.4 - 1) = 772.467 K
P₂ = P₁×r×T₂/T₁ = 100 × 8 × 772.467/300 = 2059.912 kPa
W₁₂ = Cv × (T₁ - T₂) = 0.717*(300 - 772.467) ≈ -338.76 kJ/kg
The heat added = q₂₃ = 1350 kJ/kg = Cv × (T₃ - T₂) = 0.717*(T₃- 772.467)
1350/0.717 = T₃- 772.467
T₃ = 1350/0.717 + 772.467 = 2655.3 K
T₄ = T₃ × (1/r)^(k - 1) = 2655.3 × (1/9)^(1.4 - 1) = 1102.596 K
W₃₄ = Cv×(T₃ - T₄) = 0.717 × (2655.3 - 1102.596) ≈ 1113.289 kJ/kg
The net work = W₁₂ + W₃₄ = -338.76 + 1113.289 = 774.529 kJ/kg
(b) The thermal efficiency, [tex]\eta _{th}[/tex] = 1 - T₁/T₂ = (1 - 300/772.467) × 100 ≈ 61.2%
(c) The Mean Effective Pressure, MEP = (Net work)/Displacement Volume)
For unity clearance, volume, we have;
MEP = 774.529/(9 - 1) = 96.816 kPa
(d) The maximum temperature, occur at T₃ = 2655.3 K.
Which of the following is an example of an observation?
The monkey is eight years old.
The monkey weighs twenty pounds.
The monkey is brown.
The monkey is two feet tall.
What characteristics are common to public schools? Check all that apply. require tuition to attend run by a non-government group free to students through grade 12 higher tuition than a private school run by the government funded by the government
Answer:
c, e, f.
Explanation:
I took the test
The characteristics that are common to public schools, are free to students through grade 12, run by the government, funded by the government. The correct options are B, C, and D.
What are public schools?A public school is one that is supported by the government through taxes. Attending a primary or secondary public school is free for all students.
A more educated population has lower unemployment, lower reliance on government assistance programs, and higher tax revenue.
Education is also important in reducing crime, improving public health, and increasing political and civic engagement.
A private school is self-sufficient and generates its own funding from sources such as student tuition, private grants, and endowments. A public school is funded by the government, and all students attend for free.
The characteristics that are shared by public schools are that they are free for students up to grade 12, are run by the government, and are funded by the government.
Thus, B, C, and D are correct options.
For more details regarding public schools, visit:
https://brainly.com/question/11340401
#SPJ2
4. A voltage of 120 volts is applied to a 200 Ω resistor. Calculate the current through the resistor.
Answer: 0.1
Explanation:
Answer:
The current is 0.6 or 3/5 Amps
Given:
V (voltage) = 120 volts
R (resistance) = 200 ohms
I (current) = ?
Formula:
Solution:
Therefore, the current is 0.6 or 3/5 Amps
What are the coordinates of the centroid of a triangle with vertices A(−6, 0), B(−4, 4), and C(0, 2)?
Enter your answers in the boxes.
Answer:
The required co-ordinates of the centroid are (-10/3,2)
Step-by-step explanation: We are to find the coordinates of the centroid of a triangle with vertices A(−6, 0) , B(−4, 4) , and C(0, 2).
We know that
the co-ordinates of the centroid of a triangle with vertices (a, b), (c, d) and (e, f) are given by
((a+c+e)/3,(b+d+f)/3)
Therefore, the co-ordinates of the centroid of triangle ABC are (-10/3,2)
Thus, the required co-ordinates of the centroid are (-10/3,2)
Explanation:
The coordinates of the centroid of a triangle with vertices A(−6, 0), B(−4, 4), and C(0, 2) are (-10/3,2).
What are coordinates?Coordinates are defined as a pair of numbers that use the horizontal and vertical separations from the two reference axes to define a point's location on a coordinate plane. A coordinate system is a framework for specifying the relative positions of objects inside a specific area, such as a region on the surface of the earth or the entire surface of the world.
We must determine the centroid's coordinates for a triangle whose vertices are A(6, 0), B(4, 4), and C. (0, 2).
We are aware that [(a + c + e) / 3,(b + d + f)] gives the coordinates of the centroid of a triangle with the vertices (a, b), (c, d), and (e, f).
Thus. the coordinates of the centroid of a triangle with vertices A(−6, 0), B(−4, 4), and C(0, 2) are (-10/3,2).
To learn more about coordinates, refer to the link below:
https://brainly.com/question/27749090
#SPJ2
Which option identifies what engineers will do to help in the following scenario?
After an explosion on an offshore drilling rig, engineers were called in to take action.
A) Engineers will work to design a rig that will not allow methane to escape and cause fires.
B)Engineers will create a large container to keep the flowing petroleum from entering the water.
C)Engineers will expand the drilling to divert the methane gas.
D)Engineers will work to design a system that will cap off the pipeline and stop the flow of petroleum.
Answer:
D is Correct
Explanation:
D) Engineers will work to design a system that will cap off the pipeline and stop the flow of petroleum.
In the scenario given, an explosion has occurred on an offshore drilling rig, indicating that there has been a catastrophic failure in the system. The first priority in such a situation would be to contain and stop the flow of petroleum to prevent further damage to the environment and ensure safety.
Engineers would be called in to take immediate action and design a system that will cap off the pipeline and stop the flow of petroleum. This might involve designing and installing valves or other mechanical devices that can shut off the flow of petroleum.
Option A is incorrect because preventing methane from escaping and causing fires is not the immediate priority in this situation. Option B is also incorrect because the immediate priority is to stop the flow of petroleum, not to contain it. Option C is not a feasible solution as diverting methane gas would not address the immediate issue of stopping the flow of petroleum.
Engineers will work to design a rig that will not allow methane to escape and cause fires. Thus, the correct option is A.
Thus, An engineer solves issues using math, science, and technology. Engineering is all around us, enhancing the ways that we work, travel, communicate, maintain our health, and have fun.
Engineers transform scientific information into technology, which they subsequently transform into a practical solution or innovation.
All engineers experience a sense of pride and well-being after successfully completing a challenging assignment. Making, designing, and manufacturing valuable goods and services for other people is a career that will enrich your life.
Thus, The ideal option is A.
Learn more about Engineer, refer to the link:
https://brainly.com/question/19117846
#SPJ1
What does it mean if a manufacturing company "retools"?
Answer:
It mean to equip more tools.
Explanation:
I hope this helps.
Answer:
When a manufacturing company "Retools", they simply are restocking in tools, organizing their workspace, and modifying or changing anything that needs to be changed.
Which of the following men used sketches based on telescopic imagery to present his findings in astronomy?
Galileo
Escher
Aldrin
Copernicus
The answer is:
GalileoName three things you can find with a level in construction and explain why they are Important
Answer:
Construction Management is a Huge Job :
As a part of your construction manager training, you will need to know how to take control of the entire project.
Compliance is Required :
Every state has certain rules that need to be adhered to if the project is to be carried through properly.
Managing Employees Can Be Difficult
When you are a basic construction worker with the yellow hat that we mentioned, you are only responsible for yourself.
Explanation:
Scale drawings provide an engineer with the opportunity to explore different aspects of a design.
True
False
Answer:
True
Explanation:
Force is the cause of a velocity change
The answer is true. hope this helped
Answer:
Forces affect how objects move. They may cause motion; they may also slow, stop, or change the direction of motion of an object that is already moving. Since force cause changes in the speed or direction of an object, we can say that forces cause changes in velocity. Remember that acceleration is a change in velocity
Researchers at the University of__________modified the iPhone to allow it to create medical images.
A. California
B. Wisconsin
C. Florida
Answer:
B
Explanation:
I'm so sorry if this is wrong. This is what I think it is though, I had a class like this and I think this is what I said.
Answer:
University of California
Explanation:
I just looked it up and the sights were saying California
Question* Once we have have completed the excavation , constructed forms for our footing and properly installed the rebar , what is the next step in the construction ?
NEED HELP ASAP
Concreting of Column and Bitumen Paint Applications
Plzzzzz help ASAP 50 points for the answer
4. Explain the differences between case studies, case histories, and case problems.
Why do organisms differ in their methods of reproduction?
Asexual reproduction yields genetically-identical organisms because an individual reproduces without another. In sexual reproduction, the genetic material of two individuals from the same species combines to produce genetically-different offspring; this ensures mixing of the gene pool of the species.
In modern gasoline injection systems, where does the fuel injector spray gasoline ?
Answer:
tube
Explanation:
You should read the lifts safety and operating instructions only if you havent used the automotive lift before
What is an item an electrical and mechanical engineer make
Answer:
any sort of robot as in the Da Vinci surgical robot I would think a mechanic and electrical because there is power going through it so a electrician or a electrical engineer and a mechanical engineer so it can turn and move
Explanation:
Drag each label to the correct location on the table. Match to identify permanent and temporary structures.
Answer:
Permanent Structures:
Motel
Mall
Refinery
Temporary Structures:
Kiosk
Marquee
Exhibition Stand
Explanation: Got a 100 percent on the test
Who is better Technoblade or Dream?
Answer:
technoblade
Explanation:
IM a stan and if you want i can give reasons why he is better UvU
Wear Bars appear when the tread is down to what depth?
Answer:
Two thirty seconds of an inch : 2/32"
Explanation:
Wear bars are tread wear indicators on tires located at the base of the main grooves and equally spaced around a tire. They look like narrow strips of smooth rubber across the tread and appear on the tire when the point is reached. The wear bars are an indication that the tire is worn out and needs to be replaced.
what is your favorite concole?
Answer:
Ps4
Explanation:
Answer:
ps4
Explanation:
Can someone tell me the answers I’m confused I’ll give brainlist and points if your going to be rude or not help don’t type:)!!!
Answer:
B, C, A, D
Explanation:
Your welcomed
Select the four parts of the plasma system that
are continuously monitored. (Select four that apply.)
Pressure
Oxygen
Power
Temperature
Cup
Fuel
Answer:
Power
pressure
cup
Temperature
Explanation:
The four parts of the plasma system that are continuously monitored are Pressure, Power, Temperature and Cup.
What is plasma system?Plasma system is defined as a system eliminates gas that has been adsorbed to powder surface. The foundation of plasma technology is a straightforward physical idea. When energy is applied to matter, solids become liquids, and liquids turn into gaseous states. A gas is ionized and enters the energy-rich plasma state, the fourth state of matter, if yet more energy is applied to it.
The same methods used to clean vacuum systems are used to clean plasma systems. Wherever practical, removable shields and liners ought to be used. Particulates produced by vapor phase nucleation, arcing, and flaking may be produced in significant quantities in plasma systems used for PVD processing.
Thus, the four parts of the plasma system that are continuously monitored are Pressure, Power, Temperature and Cup.
To learn more about plasma system, refer to the link below:
https://brainly.com/question/10083364
#SPJ5
Briefly explain why someone would choose a career in the geologic sciences, with at least three reasons.
Answer:
Someone could chose the career of being a geologic scientist because they can discover new things about the world.And find new things about it that wearnt discovered previously.
Explanation:
New species
New cures
New lands
Answer:
The correct answer would include that there is a need for viable energy sources, but the techniques for mining them are not yet perfected.
Explanation:
Because of this, there is much room for improvement. This is a currently growing field with high incomes possible. There is a need to find better, safer ways to clean up spills. Less dangerous ways can be designed to make such tasks more efficient.
Select the creative imaging fields that require knowledge of programming.
computer engineer
video game designer
animator
video game programmer
video game artist
graphic designer
I think:
— video game programmer— video game designer— computer engineerPlease tell me if it's right.
A species that lives in every biome and is easy to track and count is best used as
Answer:
Indicator species- Environmental indicators
Explanation:
Indicator species are those animals ,plants or micro-organisms that can be used to monitor changes in our environment. They can show how an ecosystem is responding to effects of pollution and tell us the results of how well the efforts applied to restore the ecosystem are continuing. Environmental indicators such as birds live in every climate and biome, respond quick to changes in their environment and can be easily tracked and counted.
Which of the following uses technology that converts echoes that bounce off the tissues and organs of the body into a visual image?
magnetic resonance
computed tomography
sonography
nuclear medicine
Answer:
sonography
Explanation:
"Sonographers, meanwhile, are trained in using sound waves to take images of tissues and organs in the body. These technologists, using specialized equipment, send high-frequency sound waves through the patient’s body. Consequently, echoes bounce off the tissues and organs and a special computer converts the echoes into visual images. For more information on careers in radiologic technology, visit the American Society of Radiologic Technologists’ website. This is a professional organization for people employed in radiation therapy and medical imaging."
2. Explain how fossil fuels are form
Answer:
Found from interent:
Explanation: