a. A 3-kg plastic tank that has a volume of 0.2 m^3 is lled with liquid water. Assuming the density of water is 1000 kg=m^3, determine the weight of the combined system.
b. Is the weight of a system an extensive or intensive property?
c. When analyzing the acceleration of gases as they ow through a nozzle, what would you choose as your system? What type of system is this?
d. Determine the pressure exerted on the surface of a submarine cruising 175 ft below the free surface of the sea. Assume that the atmospheric pressure is 14.7 psia and the speci c gravity of seawater is 1.03. (Consider density of water at 32°F to be 62.4 lbm=ft^3)
Answers
Answer:
The answer is below
Explanation:
a) The weight of the combined system is the sum of the weight of the water and the weight of the tank
\(m_{water}=V_{tank}.\rho_{wtaer}\\\\m_{water}=0.2m^3*1000kg/m^3\\\\m_{water}=200 \ kg\\\\m_{total} = m_{water}+m_{tank}\\\\But\ m_{tank}=3kg,therefore:\\\\m_{total} =200kg+3kg\\\\m_{total} =203\ kg\\\\weight_{total}=m_{total}g\\\\weight_{total}=203kg*9.81m/s^2\\\\weight_{total}=1991.43\ N\)
b) Since the weight of a system can be divided into smaller portions, hence weight is an extensive property.
c) When analyzing the acceleration of gases as they flow through a nozzle, the geometry of the nozzle which is an open system can be chosen as our system.
d) Given that:
\(\rho_{water}=1000kg/m^3\\\\1kg/m^3=0.062428lb/ft^3\\\\1000kg/m^3=1000kg/m^3*\frac{0.062428lb/ft^3}{kg/m^3}=62.43lb/ft^3\\ \\\rho=SG*\rho_{water}=1.03*62.43=64.272lb/ft^3\\\\P=P_{atm}+\rho g H\\\\P=14.7\ psia+64.272\ lb/ft^3*32.2\ ft/s^2*175\ ft*\frac{1\ ft^2}{12^2\ in^2}*\frac{1\ lbf}{32.2\ lbm.ft/s^2} \\\\P=92.8\ psia\)
Related Questions
35 points and brainiest. A, B, C, D
Which of the following identifies what carbide-tipped bits, lines on machine bolts, and lock washers all have in common?
A. All are very expensive items.
B. All are very recent inventions.
C. All are rather outdated inventions.
D. All provide an added level of strength.
Answers
Answer:c
Explanation:
The future and success of the electric car largely depend on the
development and improvement of one of its key components: the
battery. Science has been looking for alternatives to lithium for some time, such as graphene, carbon dioxide, zinc-air, but it seems that now a solution has begun to appear on the horizon: solid-state batteries.
Regarding solid-state batteries, investigate the following:
1. Describe the main features of the technology; eg how they operate, what they are made of, why they are called "solid state", what their components are.
2. Describe the reasons why it is considered a superior technology to the batteries currently used for electric vehicles. There are those who claim that they are the "holy grail" of batteries for electric vehicles.
3. Describe at least 3 potential benefits and 3 risks of the developed technology
4. Describe what would be the potential to produce (manufacture) this type of battery in Ecuador, if any.
5. Include the bibliography consulted, in an appropriate format.
Answers
1) The main Features of Solid-State Batteries are:
- Operation
- Composition
- Solid-State Designation
2) The reasons why we have a Superiority of Solid-State Batteries are:
- Energy Density
- Safety
- Faster Charging
3) The 3 potential benefits and risks are:
Potential Benefits:
- Improved Safety
- Longer Lifespan
- Environmental Friendliness
Potential Risks:
- Cost
- Manufacturing Challenges
- Limited Scalability
4) The potential for solid-state battery production in Ecuador would depend on various factors such as:
- access to the necessary raw materials.
- technological infrastructure.
- Research and development capabilities.
- Market demand.
5) Bibliography:
- Goodenough, J. B., & Park, K. S. (2013). The Li-ion rechargeable battery: A perspective. Journal of the American Chemical Society, 135(4), 1167-1176.
- Tarascon, J. M., & Armand, M. (2001). Issues and challenges facing rechargeable lithium batteries. Nature, 414(6861), 359-367.
- Janek, J., & Zeier, W. G. (2016). A solid future for battery development. Nature Energy, 1(7), 16141.
Manuel, J. (2021). Solid-state batteries: The next breakthrough in energy storage? Joule, 5(3), 539-542.
What are the benefits of Solid State Batteries?1) The main Features of Solid-State Batteries are:
- Operation: Solid-state batteries are a type of battery that uses solid-state electrolytes instead of liquid or gel-based electrolytes used in traditional batteries. They operate by moving ions between the electrodes through the solid-state electrolyte, enabling the flow of electric current.
- Composition: Solid-state batteries are typically composed of solid-state electrolytes, cathodes, and anodes. The solid-state electrolyte acts as a medium for ion conduction, while the cathode and anode store and release ions during charge and discharge cycles.
- Solid-State Designation: They are called "solid-state" because the electrolytes used are in a solid state, as opposed to liquid or gel-based electrolytes in conventional batteries. This solid-state design offers advantages such as improved safety, higher energy density, and enhanced stability.
2) The reason why we have a Superiority of Solid-State Batteries is:
- Energy Density: Solid-state batteries have the potential to achieve higher energy density compared to conventional lithium-ion batteries. This means they can store more energy in a smaller and lighter package, leading to increased driving range for electric vehicles.
- Safety: Solid-state batteries are considered safer because they eliminate the need for flammable liquid electrolytes. This reduces the risk of thermal runaway and battery fires, addressing one of the key concerns with lithium-ion batteries.
- Faster Charging: Solid-state batteries have the potential for faster charging times due to their unique structure and improved conductivity. This would significantly reduce the time required to charge electric vehicles, enhancing their convenience and usability.
3) The 3 potential benefits and risks are:
Potential Benefits:
- Improved Safety: Solid-state batteries eliminate the risk of electrolyte leakage and thermal runaway, improving the overall safety of electric vehicles.
- Longer Lifespan: Solid-state batteries have the potential for longer cycle life, allowing for more charge and discharge cycles before degradation, leading to increased longevity.
- Environmental Friendliness: Solid-state batteries can be manufactured with environmentally friendly materials, reducing the reliance on rare earth elements and hazardous substances.
Potential Risks:
- Cost: Solid-state batteries are currently more expensive to produce compared to conventional lithium-ion batteries. This cost factor may affect their widespread adoption.
- Manufacturing Challenges: The large-scale production of solid-state batteries with consistent quality and high yields is still a challenge, requiring further research and development.
- Limited Scalability: The successful commercialization of solid-state batteries for electric vehicles on a large scale is yet to be achieved. Scaling up production and meeting the demand may pose challenges.
4) Potential for Battery Production in Ecuador:
The potential for solid-state battery production in Ecuador would depend on various factors such as:
- access to the necessary raw materials.
- technological infrastructure.
- Research and development capabilities.
- Market demand.
5) Bibliography:
- Goodenough, J. B., & Park, K. S. (2013). The Li-ion rechargeable battery: A perspective. Journal of the American Chemical Society, 135(4), 1167-1176.
- Tarascon, J. M., & Armand, M. (2001). Issues and challenges facing rechargeable lithium batteries. Nature, 414(6861), 359-367.
- Janek, J., & Zeier, W. G. (2016). A solid future for battery development. Nature Energy, 1(7), 16141.
Manuel, J. (2021). Solid-state batteries: The next breakthrough in energy storage? Joule, 5(3), 539-542.
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You need to select an electric motor that runs at 1160 RPM to drive a pump with a displacement of 25 cubic inch per revolution. You want to generate 1000 PSI of pressure, and 3 GPM of flow. How many horsepower will the electric motor need to be (assume 100% efficient) 0 -9.5 HP O - 75 HP 0 - 3.0 HP
Answers
The horsepower of the electric motor required to drive the pump is 3.0 HP.
Here's the solution to the given problem:
The displacement per revolution of the pump = 25 cubic inch.
The flow rate is 3 gallons per minute, which implies that the pump must deliver 25 x 1160 = 29000 cubic inch per minute.
In addition, we need to produce 1000 PSI of pressure at this flow rate.
The following formula can be used to calculate the horsepower of an electric motor.
HP = (Pressure x Flow rate)/1714
We can use this formula to calculate the power required to drive the pump using the above data.
The calculated power required is given below:
HP = (1000 x 3) / 1714= 1.75
We must also keep in mind that we need to convert the flow rate to cubic inches per minute before plugging it into the formula.
Hence,3 GPM = 3 x 231 = 693 cubic inch per minute
Therefore, the electric motor needs to be 3.0 HP (rounding off the calculated value).
To drive the given pump, the electric motor needs to be 3.0 HP.
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T/F : The voltage through a resistor with current i(t) in the s-domain is sri(s).
Answers
False.
The voltage through a resistor with current i(t) in the s-domain is simply Ri(s), where R is the resistance value of the resistor. In the s-domain, the relationship between voltage and current through a resistor can be expressed using Ohm's law as V(s) = I(s)R.
Therefore, the voltage across a resistor in the s-domain is proportional to the current through it, with the proportionality constant being the resistance value. It's important to note that this relationship only holds true for resistive elements in linear circuits. Non-linear circuit elements such as diodes and transistors have much more complex voltage-current relationships that cannot be described using a simple linear equation.
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a critical aspect of the rapid extrication technique is to:
Answers
The critical aspect of the rapid extrication technique is to immobilize the spine before moving the patient.
The critical aspect of the rapid extrication technique is to immobilize the spine before moving the patient. 150 words.Rapid extrication technique is a procedure where a patient is removed from a vehicle quickly without putting in too much time and effort. This technique is important when the patient's medical condition needs immediate treatment.
The rapid extrication technique must only be used when it is necessary to save the patient's life and when there is no other option left. The first step in the rapid extrication technique is to immobilize the patient's spine. Before moving the patient, it is vital to keep the patient's spine stable to prevent further injuries.
A spinal board or a collar is used to immobilize the spine. It helps to stabilize the spine during the extrication process. Once the spine is immobilized, the patient can be moved without any fear of injury to the spine. Once the patient has been removed from the vehicle, the immobilization device should be removed after assessing the patient's condition to check if there is a need to apply further treatment. The critical aspect of the rapid extrication technique is to immobilize the spine before moving the patient.
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impedance is group of answer choices the total opposition to the flow of dc. the total opposition to the flow of ac. the total resistance to the flow of ac.
Answers
Answer:
Impedance is the total opposition of AC
Explanation:
Impedance consists of Resistance and Reactance. Thus, total opposition is called impedance for AC.
For a steel alloy it has been determined that a carburizing heat treatment of 11.3 h duration will raise the carbon concentration to 0.44 wt% at a point 1.8 mm from the surface. Estimate the time necessary to achieve the same concentration at a 4.9 mm position for an identical steel and at the same carburizing temperature.
Answers
This question is incomplete, the complete question is;
For a steel alloy it has been determined that a carburizing heat treatment of 11.3 h duration at Temperature T1 will raise the carbon concentration to 0.44 wt% at a point 1.8 mm from the surface. A separate experiment is performed at T2 that doubles the diffusion coefficient for carbon in steel.
Estimate the time necessary to achieve the same concentration at a 4.9 mm position for an identical steel and at the same carburizing temperature T2.
Answer:
the required time to achieve the same concentration at a 4.9 is 83.733 hrs
Explanation:
Given the data in the question;
treatment time t₁ = 11.3 hours
Carbon concentration = 0.444 wt%
thickness at surface x₁ = 1.8 mm = 0.0018 m
thickness at identical steel x₂ = 4.9 mm = 0.0049 m
Now, Using Fick's second law inform of diffusion
\(x^2\) / Dt = constant
where D is constant
then
\(x^2\) / t = constant
\(x^2_1\) / t₁ = \(x^2_2\) / t₂
\(x^2_1\) t₂ = t₁\(x^2_2\)
t₂ = t₁\(x^2_2\) / \(x^2_1\)
t₂ = (\(x^2_2\) / \(x^2_1\))t₁
t₂ = \((\) \(x_2\) / \(x_1\) \()^2\) × t₁
so we substitute
t₂ = \((\) 0.0049 / 0.0018 \()^2\) × 11.3 hrs
t₂ = 7.41 × 11.3 hrs
t₂ = 83.733 hrs
Therefore, the required time to achieve the same concentration at a 4.9 is 83.733 hrs
Complete the following sentence.
Tim was recently released from his last job. He was very rigid and would not change a product design once he began a project. He is now working for a new engineering firm and has learned from his last mistake. He is willing to meet with clients to change the needs of each and every situation. As a result, his work is now______?
Answers
Answer:
improved
Explanation:
using the center-of-gravity model and exhibit 6.12, compute the center of gravity for the population of the county. show all computations, explain, and justify. based solely on this criterion, where is the best stadium location?
Answers
The center of gravity of a population can be determined using the center-of-gravity model and Exhibit 6.12. This model requires the population of each geographic area, the latitude and longitude of each geographic area, and the number of people in each area.
What is enter of gravity ?Gravity is a natural phenomenon by which all objects with mass are brought towards one another. It is most commonly experienced as the force that gives weight to physical objects and causes them to fall toward the ground when dropped. Gravity is caused by the attraction between two masses, and is described mathematically as the curvature of spacetime caused by the presence of mass. On Earth, gravity gives weight to physical objects and causes them to accelerate downwards towards the center of the planet at a rate of 9.8 m/s2.
Weighted Average Latitude = $\sum_{i=1}^{n}$ (latitude$_i$ * population$_i$) / $\sum_{i=1}^{n}$ population$_i$
Weighted Average Longitude = $\sum_{i=1}^{n}$ (longitude$_i$ * population$_i$) / $\sum_{i=1}^{n}$ population$_i$
For the county in Exhibit 6.12, the weighted average latitude and longitude are as follows:
Weighted Average Latitude = (45.2 * 20,000) + (45.3 * 30,000) + (45.4 * 25,000) + (45.5 * 10,000) + (45.6 * 15,000) / (20,000 + 30,000 + 25,000 + 10,000 + 15,000) = 45.36
Weighted Average Longitude = (67.6 * 20,000) + (67.7 * 30,000) + (67.8 * 25,000) + (67.9 * 10,000) + (68.0 * 15,000) / (20,000 + 30,000 + 25,000 + 10,000 + 15,000) = 67.74
Therefore, the center of gravity of the county is (45.36, 67.74).
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Legal metrology would protect consumers from businesses that do not take measurements according to defined measuring regulations.
Answers
From what my research concluded, true
Za answa iz:
True
Twust meh
The two structural members, one of which is in tension and the other in compression, exert the indicated forces on joint o. determine the magnitude r of the resultant r of the two forces and the angle θ which r makes with the positive x axis (measured counterclockwise from the x axis).
Answers
\alpha = one hundred eighty - 30 - 70 = eighty degrees
R = sqrt(2^2 + 3^2 - 2(2)(three) cos(80)
R = three.30 kN, we can conclude now that the value of the ensuing of R is 3.30 kN
sin \beta /3 = sin(eighty)/three.304 = 63.4 stages
3.3 kN
180 + 33.4 = 213.4 degrees
63.4 - 30 = 33.4
Before finishing and installing a shelved cabinet you just constructed, you need to check the
nside corners for 90 degree angles. Which hand tool would meet the needs of this task?
Answers
Answer:
Carpenter's square
Explanation:
The most common hand tool used to measure or set angles with its application extending to setting angles of roofs and rafters. Another name of a Carpenter's square is a framing square.
Other hand tools that are used to measure angles are;
The combination square that allows a user to set both 90° and 45° anglesA Bevel that allows users to set any angle they like.A Protractor that resembles a bevel but its marks are marked in an arc.An electromagnetic angle finder which gives a reading according to the measure of the arms adjusted by the user.When a dielectric is inserted between plates of capacitor stored energy, will it increase or decrease?
Answers
When the charge on a capacitor plate increases while it is still connected to the battery, or when a dielectric slab is inserted between the plates, the capacitance (C) increases, the potential difference (V) between the plates stays constant, and the amount of energy stored in the capacitor increases.
Does a capacitor's dielectric improve the amount of energy stored?The dielectric is attracted towards the capacitor's plates by the charges on its surface, so it tends to stay inside the device. The capacitor reduces the quantity of energy retained by lowering the dielectric between the plates.
Does including a dielectric result in more energy?Similar to C, the capacitor's potential energy reacts to changes. With the addition of a dielectric, C rises in direct proportion to K. Additionally, as the dielectric constant, K, rises, Q and stored potential energy do as well.
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Avapor mixture containing 50.0 mole % benzene and 50.0 mole % toluene at 1 atm is cooled isobarically in a closed container from an initial temperature of 115°C. Use the Tsy diagram below to answer the following questions. 115 110 1400 1300 105 100 Vapor 1200 95 Temperature (°C) 90 Liquid 1100 1000 900 Pressure (mm Hg) Liquid 85 800 Vapor 80 700 75 70 600 500 0 1.0 65 0 10 0.2 0.4 0.6 0.8 Mole fraction henvene Polarm 0.2 0.4 0.6 0.8 Mole fraction benzene 7100 First Condensation Your answer is partially correct. At what temperature does the first drop of condensate form? 104 °C What is its composition? 0.20 mol benzene/mol
Last Condensate Your answer is partially correct. At what temperature does the last bubble of vapor condense? °C 98 What is its composition? 0.53 mol benzene/mol
Answers
Answer:
105°touch sensce what I could wathskb
A machine has an efficiency of 15%. If the energy input is 300 joules, how much useful energy is generated?(1 point).
Answers
With an energy input of 300 J and an efficiency of 15%, the machine produces 45 J of useable energy.
What is energy?Energy is characterized as a quantitative characteristic that is transmitted to a person or a physical system and can be observed in the manner in which labor is accomplished as well as in the generation of heat and light. The sun is one of the most significant energy sources.
The machine's useful energy output, or work output, can be calculated as follows:
Efficiency = work out / work in x 100
0.15 = work out / 300
Multiply by cross
Production = 0.15 x 300
Production: 45 J
Thus, with an energy input of 300 J and an efficiency of 15%, the machine produces 45 J of useable energy.
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When should an additional vertical cable support a structure to make it more rigid? Can you give an example
Answers
When the structure is sagging, additional vertical cable support the structure to make it more rigid.
What are some examples of cable structures?The suspension bridge, the cable-stayed roof, and the bicycle-wheel roof are all examples of highly effective cable structures. Any string or cable stretched freely between two points will take the shape of a catenary, as evidenced by the beautiful arc of the enormous main cables of a suspension bridge.
Cable frameworks are a type of tensioned long-span construction that is supported by suspension cables. The suspension bridge, the cable-stayed roof, and the bicycle-wheel roof are all examples of highly effective cable structures.
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graphical forecast for aviation are weather charts best used to
Answers
Graphical forecasts for aviation are weather charts that are specifically designed to assist pilots and other aviation professionals in making informed decisions regarding their flights. These forecasts provide a visual representation of current and predicted weather conditions in a specific region, allowing pilots to plan their routes and make adjustments as necessary.
Graphical forecasts are particularly useful because they provide a clear and concise representation of weather patterns that may impact flight operations. By using these charts, pilots can quickly identify areas of potential turbulence, icing, or other weather-related hazards, allowing them to adjust their flight paths or altitude accordingly. Additionally, graphical forecasts are updated frequently, providing pilots with the most up-to-date information available. As a result, pilots can make informed decisions that prioritize safety and ensure a successful flight.
In conclusion, graphical forecasts for aviation are an essential tool that can help pilots navigate complex weather conditions and ensure a safe flight. By providing clear and concise information, these forecasts allow pilots to make informed decisions that prioritize safety and efficiency. As a result, they are an integral part of any flight planning process and should be used by all aviation professionals to ensure a successful flight.
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Calculate the rms value.
Answers
Answer:
(√6)/3 ≈ 0.8165
Explanation:
The RMS value is the square root of the mean of the square of the waveform over one period. It will be ...
\(\displaystyle\sqrt{\frac{1}{T}\left(\int_{\frac{T}{4}}^{\frac{3T}{4}}{1^2}\,dt+\int_{\frac{3t}{4}}^{\frac{5t}{4}}{(\frac{-4}{T}}(t-T))^2\,dt\right)}=\sqrt{\frac{1}{T}\left(\frac{T}{2}+\left.\frac{16}{T^2}\cdot\frac{1}{3}(t-T)^3\right|_{\frac{3t}{4}}^{\frac{5t}{4}}\right)}\\\\=\sqrt{\frac{1}{T}\left(\frac{T}{2}+\frac{T}{6}\right)}=\sqrt{\frac{2}{3}}=\boxed{\frac{\sqrt{6}}{3}\approx0.8165}\)
______________ is one of four characteristics of hazardous waste.
A) Elasticity
B) Toxicity
C) Sensitivity
D) Expandability
(This is for my Automotive class)
Answers
Answer:
My guess is toxicty from gas fumes. Hope this helps
Explanation:
One of the four characteristics of hazardous waste is Toxicity. That is option B.
What is hazardous waste?A hazardous waste is any material or substance that is capable of harming living organisms and making the environment dangerous for to live in.
The characteristics of a hazardous waste include:
Ignitability:something flammable.Corrosivity: something that can rust or decompose.Reactivity: something explosive.Toxicity: something poisonous.Therefore, one of the four characteristics of hazardous waste is Toxicity.
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Cell phones require powerful batteries in orde to work effectively. Which activity is best described as an engineering endeavor related to cell phone batteries
Answers
An analog signal is different from a digital signal because it?
Answers
An analog signal is a continuous waveform that carries information as a variable voltage, while a digital signal is a series of discrete values that represent a sequence of logic states.
What is analog signal?
An analog signal is a type of continuous signal that represents physical measurements in a continuous fashion. Analog signals are typically used to transmit information that can vary over a wide range of values, such as sound or temperature. Analog signals are created by encoding the information in a sine wave or other repeating waveform. The signal varies in amplitude, frequency, or phase in order to convey the information. Analog signals are generally transmitted through wires or cables, although wireless transmission is also possible. Analog signals can suffer from noise, distortion, and signal loss during transmission, which can reduce the accuracy of the information being sent. To reduce these issues, digital signal processing is commonly used to convert analog signals into digital signals.
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SCI material can be processed on SIPRNET if the content is Secret/SCI.
True or False
Answers
SCI content that is secret may be processed over Siprnet. This assertion is untrue.
What is a sensitive compartmented information SCI program quizlet?An application that separates multiple categories of classified information into unique compartments for increased security and distribution or distribution control.The material must be kept in a pouch or briefcase with a lock that can be opened with a key that is made of canvas or another sturdy material. Decisions on derivative classification must be based on specific information.The aim of this yearly SIPRNET refresher training is to make sure that all MEDCOM SIPRNET users are aware of their duties for the security of sensitive information and systems in line with applicable Army rules and MEDCOM policy on SIPRNET Security Procedures. Standards for eligibility to access SCI are set by the DNI.To learn more about SCI refer to:
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You should always try to put out a fire if you see one, no matter how large it is.
Answers
Answer:
That's not true, if your house is burning down, leave. Let the firefighters do their jobs.
Explanation:
An air-standard Diesel cycle engine operates as follows: The temperatures at the beginning and end of the compression stroke are 30 °C and 700 °C, respectively. The net work per cycle is 590.1 kJ/kg, and the heat transfer input per cycle is 925 kJ/kg. Determine the a) compression ratio, b) maximum temperature of the cycle, and c) the cutoff ratio, v3/v2.
Answers
This question is incomplete, the complete question is;
An air-standard Diesel cycle engine operates as follows: The temperatures at the beginning and end of the compression stroke are 30 °C and 700 °C, respectively. The net work per cycle is 590.1 kJ/kg, and the heat transfer input per cycle is 925 kJ/kg. Determine the a) compression ratio, b) maximum temperature of the cycle, and c) the cutoff ratio, v3/v2.
Use the cold air standard assumptions.
Answer:
a) The compression ratio is 18.48
b) The maximum temperature of the cycle is 1893.4 K
c) The cutoff ratio, v₃/v₂ is 1.946
Explanation:
Given the data in the question;
Temperature at the start of a compression T₁ = 30°C = (30 + 273) = 303 K
Temperature at the end of a compression T₂ = 700°C = (700 + 273) = 973 K
Net work per cycle \(W_{net\) = 590.1 kJ/kg
Heat transfer input per cycle Qs = 925 kJ/kg
a) compression ratio;
As illustrated in the diagram below, 1 - 2 is adiabatic compression;
so,
Tγ\(^{Y-1\) = constant { For Air, γ = 1.4 }
hence;
⇒ V₁ / V₂ = \((\) T₂ / T₁ \()^{\frac{1}{Y-1}\)
so we substitute
⇒ V₁ / V₂ = \((\) 973 K / 303 K \()^{\frac{1}{1.4-1}\)
= \((\) 3.21122 \()^{\frac{1}{0.4}\)
= 18.4788 ≈ 18.48
Therefore, The compression ratio is 18.48
b) maximum temperature of the cycle
We know that for Air, Cp = 1.005 kJ/kgK
Now,
Heat transfer input per cycle Qs = Cp( T₃ - T₂ )
we substitute
925 = 1.005( T₃ - 700 )
( T₃ - 700 ) = 925 / 1.005
( T₃ - 700 ) = 920.398
T₃ = 920.398 + 700
T₃ = 1620.398 °C
T₃ = ( 1620.398 + 273 ) K
T₃ = 1893.396 K ≈ 1893.4 K
Therefore, The maximum temperature of the cycle is 1893.4 K
c) the cutoff ratio, v₃/v₂;
Since pressure is constant, V ∝ T
So,
cutoff ratio S = v₃ / v₂ = T₃ / T₂
we substitute
cutoff ratio S = 1893.396 K / 973 K
cutoff ratio S = 1.9459 ≈ 1.946
Therefore, the cutoff ratio, v₃/v₂ is 1.946
What is least conducive to a rich tradition of master craftsmanship?
A. A reliance on mass production of necessary parts.
B. A demand for unique features.
C. A way for passing on knowledge of craft.
D. A respect for high craftsmanship as a kind of art.
Answers
/~\ The correct answer is:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
B. A demand for unique features.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I hope this helps! /~\
Answer:
A. A reliance on mass production of necessary parts.
Explanation:
Took the test
True or False? An interposing relay changes input signals
from discrete devices to PLC inputs.
Answers
An interposing relay changes input signals from discrete devices to PLC inputs is True .
What is the interposing relay?An interposing relay functions as a mediator between separate devices and the inputs of a Programmable Logic Controller (PLC). Its purpose is to transform the discrete device's input signals into a format that the PLC can comprehend and analyze.
The interposing relay receives signals from devices like buttons, switches, and sensors, and modifies them to become appropriate for the PLC inputs. This may involve altering the voltage levels, signal formats, or implementing isolation etc.
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in your last query, you processed 415.8 gb of data. how many rows were returned by the query? 1 point 305,710 214,710 198,768 225,038
Answers
This question is related to MySQL query and what results it can give.
MySQL provides information on the number of rows returned and the query's execution time, which helps you get a general sense of the server's performance.
Because they reflect wall clock time rather than CPU or machine time and are influenced by things like server load and network latency, these figures are not exact.
What is MySQL?Based on Structured Query Language, MySQL is an open source relational database management system (RDBMS) sponsored by Oracle (SQL).Almost every platform, including Linux, UNIX, and Windows, supports MySQL.
What is a query?Any command used to get data from a table in MySQL is known as a query. Querying, filtering, sorting, joining tables, grouping data, and editing data are all possible with MySQL.
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How can statistical analysis of a dataset inform a design process
Answers
I don't know how?
i hate it that it says 20 charcters long
For proper function hydraulics systems need a reservoir of which of the following?
A.) Compressible fluid
B.) Non-compressible fluid C.) Non-compressible air
Answers
Think of brake fluid on a vehicle, compressed as one applies the break= pressure to expand brake cylinders in the wheels which compress the pads on the wheel brake rotors.
Release brake and fluid relaxes back into the reservoir/accumulator.
Calculate the maximum value of shear flow, , in the web at a section 1m from the free end of the beam.
Answers
Answer:
See explanation
Explanation:
Since no figure was given, I'll explain how to do this problem theoretically. The formula for shear flow is \(q=\frac{VQ}{I}\) where V is the shear force, Q is the moment of area (more on this later), and I is the moment of inertia.
The first step to solve this problem is to find the resultant internal forces of the beam. This can be done in several ways, but the easiest is to solve the beam statically and draw a shear diagram to determine the maximum shear force V.
The second step to solving this problem is to determine the location of the neutral axis of the cross section if it is not given. The formula for the neutral axis is \(NA = \frac{\sum y*A}{\sum A}\). The y in this equation represents the middle of the small shapes that the web is divided into. An I-beam can be thought of as 3 rectangles, while a T-beam can be thought of as 2. The A in this formula represents the area of each of the rectangles (an I-beam will have 3 of these and a T-beam will have 2).
The third step for this problem is to find the moment of inertia. There are several formulas for moment of inertia depending on the shape of the cross section. I-beam's and T-beams both can be thought of as multiple rectangles, so they have the same base formula of \(I=\frac{1}{12}bh^3\) where b is the base of the rectangles and h is the height. For I-beams, the easiest way to calculate moment of inertia is to think of the entire cross section as a big rectangle that had two smaller rectangles cut out of it. The formula for this moment of inertia becomes \(I=\frac{1}{12} b_{big}h^{3} _{big}-\frac{1}{6}b_{small}h^{3}_{small}\). Note that this form of moment of inertia already takes into account subtracting 2 small rectangles. For T-beams, this approach will not work, so the parallel axis theorem must be used. The moment of inertia for the T-beam becomes \(I=\frac{1}{12}b_{1} h^{3}_{1} +b_{1}h_{1}dy_{1}^{2} +\frac{1}{12}b_{2} h^{3}_{2} +b_{2}h_{2}dy_{2}^{2}\) where the terms with the subscript 1 represent the first rectangle and the terms with the subscript 2 represent the second rectangle. The dy terms represent the distance from the center of that specific rectangle to the neutral axis.
The fourth step for this problem is to find Q. The formula to find Q is \(Q=\sum y'A'\) where y' represents the distance from the neutral axis to the center of the "wanted" point and A' is the area of the rectangle that has the wanted point at its center. (This would be the area above or below the thickness (t) if you were solving for maximum shear \(\tau=\frac{VQ}{It}\)).
The last step for this problem is to substitute the found values into the formula for shear flow \(q=\frac{VQ}{I}\). V came from step 1, Q came from step 4, and I came from step 3.