Answer:
COP(heat pump) = 2.66
COP(Theoretical maximum) = 14.65
Explanation:
Given:
Q(h) = 200 KW
W = 75 KW
Temperature (T1) = 293 K
Temperature (T2) = 273 K
Find:
COP(heat pump)
COP(Theoretical maximum)
Computation:
COP(heat pump) = Q(h) / W
COP(heat pump) = 200 / 75
COP(heat pump) = 2.66
COP(Theoretical maximum) = T1 / (T1 - T2)
COP(Theoretical maximum) = 293 / (293 - 273)
COP(Theoretical maximum) = 293 / 20
COP(Theoretical maximum) = 14.65
The main target of the diplexer is to enable the antenna to work at different frequencies. *
True
False
True is the answer.....
Suppose a 3-input AND gate was not available. Could you build a 3-input AND gate using two 2-input AND gates? Explain. (f) If you used two 2-input AND gates to build each 3-input AND gate, could you still have implemented fi with just 3 chips? Explain your answer.
I Yes, it is possible to build a 3-input AND gate using two 2-input AND gates.
ii. You would still need a minimum of four chips to implement the 3-input AND operation.
How to explain the informationI Input A and input B are connected to the inputs of the first 2-input AND gate.
The output of the first AND gate is connected to one of the inputs of the second 2-input AND gate.
Input C is connected directly to the remaining input of the second AND gate.
The output of the second AND gate is the output of the 3-input AND gate.
ii Regarding your second question, if you used two 2-input AND gates to build each 3-input AND gate, you would still need a minimum of four chips to implement the 3-input AND operation. Each 3-input AND gate requires two 2-input AND gates, so you would need at least two 3-input AND gates, which would require four chips in total.
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5 kg of a wet steam has a volume of 2 m3
at a pressure of 200 kPa. If the volume remains
constant and heat is added until the pressure reaches 800 kPa, find the initial and final
dryness fraction of the steam.
(b) Calculate the heat input for the reversible process defined in the problem above.
What type of cartilage provides support and shock absorption?.
Answer:
fibrocartilage
A venture tube is used to measure the flow rate of a liquid in a pipe (liquid density is 800 kg/m3). The pipe has a diameter of 10 cm and the smallest diameter of the venture has a diameter of 4 cm. A manometer with a manometer fluid of mercury (specific weight of 133 kN/m3) is used to calculate the flow rate which is connected to the venture section such that one leg is far upstream and the second leg is at the minimum diameter of the venture tube. If the flow rate is 0.05 m3/s determine the elevation change in the manometer fluid.
a. 14.6 m
b. 9.28 m
c. 4.64 m
d. 2.32 m
Answer:
\(\triangle h=4.935m\)
Explanation:
From the question we are told that:
Liquid density \(\rho=800\)
Diameter of pipe \(d=4cm \approx 0.004m\)
Diameter of venture \(d=10cm \approx 0.010m\)
Specific weight of mercury P_mg \(133 kN/m^3\)
Flow rate \(r=0.05 m^3/s\)
Area A:
\(A_1=\frac{\pi}{4}0.1^2\\A_1=0.00785m^2\\A_2=\frac{\pi}{4}0.04^2\\A_2=0.001256m^2\\\)
Generally the Bernoulli's equation is mathematically given by
\(\frac{P_1}{\rho_1g}+\frac{V_1^2}{2g}=\frac{P_2}{\rho g}+\frac{V_2^2}{2g}\\\)
Where
\(V_1=\frac{r}{A_1} \\\\ &V_1=\frac{r}{A_2}\)
Therefore
\(P_1-P_2=\frac{Pr^2}{2}(\frac{A_1^2-A_2^2}{A_1^2A_2^2})\)
Generally the equation for pressure difference b/w manometer fluid is given as
\(P_1-P_2=(p_mg-pg)\triangle h\)
Therefore
\((p_mg-pg)\triangle h=\frac{Pr^2}{2}(\frac{A_1^2-A_2^2}{A_1^2A_2^2})\)
\(\triangle h=\frac{\frac{Pr^2}{2}(\frac{A_1^2-A_2^2}{A_1^2A_2^2})}{(p_mg-pg)}\)
\(\triangle h=\frac{\frac{(800)(0.05)^2}{2}(\frac{(0.1)^2-(0.4)^2}{(0.1)^2(0.04)^2})}{(1.33*10^3-800*9.81)}\)
\(\triangle h=4.935m\)
Therefore elevation change is mathematically given by
\(\triangle h=4.935m\)
1) Which of the following is not true about instant messaging? O It only requires an Internet connection O It does not use cellular data O It can often be real-time communication O Because of security concerns, businesses do not use it.
The statement which is true regarding the instant messaging is that Because of security concerns, businesses do not use it. Thus, option fourth is correct.
What is Instant messaging?Instant messaging is a sort of online talk that allows for real-time text transfer via the Internet or the other computer network. Messages are often sent between two or more parties when each user enters text and sends it to the receiver, who are all linked to the same network.
Instant messaging (IM) solutions allow for instant textual contact between two parties. The assertion about instant messaging that is accurate is that corporations do not utilize it due to security concerns. As a result, option four is correct.
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John has just graduated from State University. He owes $35,000 in college loans, but he does not have a job yet. The college loan company has agreed to give John a break on a deferred-payment plan that works as follows. John will not have to repay his loan for 5 years. During this “grace period” the loan obligation will compound at 4% per year. For the next 5 years, a monthly payment will be required, and the interest rate will be 0.5% per month. What will be John’s monthly payment over the 60-month repayment period?
Answer:
The correct response is "821.88". A further explanation is given below.
Explanation:
According to the question,
The largest amount unresolved after five years would have been:
= \(35000\times (\frac{F}{P}, 4 \ percent,5 )\)
= \(35000\times 1.216 7\)
= \(42584.50\)
Now,
time (t) will be:
= \(5\times 12\)
= \(60 \ monthly \ payments\)
So, monthly payment will be:
= \(42582.85\times (\frac{A}{P}, 0.5 \ percent,60 )\)
= \(42584.50\times 0.0193\)
= \(821.88\)
1. A thin-walled cylindrical pressure vessel is capped at the end and is subjected to an internal pressure (p). The inside diameter of the vessel is 6 ft and the wall thickness is 1.5 inch. The vessel is made of steel with tensile yield strength and compressive yield strength of 36 ksi. Determine the internal pressure required to initiate yielding according to (a) The maximum-shear-stress theory of failure, and (b) The maximum-distortion-energy theory of failure, if a factor of safety (FS) of 1.5 is desired.
For the beam loaded as shown in Fig Q2a. perform the following task:
Calculate the support reactions at A and E;
(i)
Draw the shear force diagram for the beam showing all important
values;
>
(iii)
Draw the bending moment diagram for the beam showing all
important values.
6 kN
10 KN
2 kN/m
B
D
1 m
1 m
1 m
1 m
Answer:
a
Explanation:
aaaaaa
(MATLAB)
1. (Workspace)
Name Value Size Min Max Class
x 1x21 double 1x21 -10 10 double
a. It stores 21 bytes of data.
b. It contains only positive values.
c. It contains numeric data.
d. It is a scalar variable.
2. Which options in the context menu opens a file in the MATLAB Editor that contains the selected commands?
a. Evaluate Selection
b. Create script
c. Create Shortcut
d. Cut
e. Copy
3. The variable A is a vector of length 20 with integer values in the range from 1 to 100. Which command substitutes all values between 40 and 50 inclusive with 0?
a. A(A>=40&A<=50) =0
b. A(A>=40 | A<=50) =0
c. A(40<=A<=50) =0
This command uses logical indexing to identify elements in the vector A that satisfy the condition (between 40 and 50 inclusive) and assigns them the value of 0. The logical AND operator (&) is used to combine the two conditions (A >= 40 and A <= 50).
(MATLAB - Workspace)
a. It stores 21 elements of data.
b. It may contain positive, negative, or zero values as the data type is "double," which represents floating-point numbers in MATLAB.
c. It contains numeric data, specifically of type "double."
d. It is not a scalar variable as it has 21 elements, making it a 1x21 vector.
(MATLAB - Editor)
The option in the context menu that opens a file in the MATLAB Editor, containing the selected commands, is "b. Create script." Selecting this option will create a new MATLAB script file (.m file) with the selected commands, which can be opened and edited in the MATLAB Editor.
(MATLAB - Vector Manipulation)
The correct command to substitute all values between 40 and 50 (inclusive) with 0 in the variable A, which is a vector of length 20 with integer values in the range from 1 to 100, is:
a. A(A >= 40 & A <= 50) = 0
This command uses logical indexing to identify elements in the vector A that satisfy the condition (between 40 and 50 inclusive) and assigns them the value of 0. The logical AND operator (&) is used to combine the two conditions (A >= 40 and A <= 50).
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ANSER QUICKLY ONLY HAVE 2 HOURS ON THIS TEST
A system of symbols and pictures used to inform others on the life and culture of a civilization is known as
Answer:
It is known as (PCS)
Explanation:
That sounds a lot like:
hieroglyphics(aka. a stylized picture of an object representing a word, syllable, or sound, as found in ancient Egyptian and other writing systems.)
Write the command that can be used to answer the following questions. (Hint: Try each out on the system to check your results. )
a. Find all files on the system that have the word "test" as part of their filename.
b. Search the PATH variable for the pathname to the awk command.
c. Find all files in the /usr directory and subdirectories that are larger than 50 kilobytes in size.
d. Find all files in the /usr directory and subdirectories that are less than 70 kilobytes in size.
e. Find all files in the / directory and subdirectories that are symbolic links.
f. Find all files in the /var directory and subdirectories that were accessed less than 60 minutes ago.
g. Find all files in the /var directory and subdirectories that were accessed less than six days ago. H. Find all files in the /home directory and subdirectories that are empty. I. Find all files in the /etc directory and subdirectories that are owned by the group bin
The UHRS platform is optimized for Edge/Internet Explorer only. You can still use your favorite browser, but keep in mind that you may experience technical issues when working on UHRS with a different browser than Edge or Internet Explorer.
UHRS is optimized for...
It is to be noted that all UHRS platforms are optimized for the popular kinds of internet browser applications.
What is a UHRS?The Universal Human Relevance System (UHRS) is a crowdsourcing platform that allows for data labeling for a variety of AI application situations.
Vendor partners link people referred to as "judges" to offer data labeling at scale for us. All UHRS judges are bound by an NDA, ensuring that data is kept protected.
A browser is a software tool that allows you to see and interact with all of the knowledgeon the World Wide Web. Web sites, movies, and photos are all examples of this.
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the roll-off rate for a fet amplifier is approximately ________.
a. 6 db per decade b. 60 db per decade
c. 20 db per octave d. 6 db per octave
The roll-off rate for a FET amplifier is approximately a. 6 db per decade.
The roll-off rate for a FET (Field Effect Transistor) amplifier refers to the rate at which the gain of the amplifier decreases as the frequency of the input signal increases. A roll-off rate of 6 dB per decade means that for every tenfold increase in frequency, the gain of the amplifier decreases by 6 decibels (dB).
This relationship between frequency and gain is commonly expressed using a logarithmic scale, such as decibels, which allows for easier comparison of values that vary over a large range. So the answer is a. 6 db per decade.
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When referring to private land use restrictions, fence height, additional structures, and architectural design are generally categorized under ______.
The fence height, additional structures, and architectural design are generally categorized under covenants.
What is the land use about?The primary private land-use control is known to be a form of a deed restrictions, that hinders what a person can do on the property as regards to the owner.
Note that in the case above, the fence height, additional structures, and architectural design are generally categorized under covenants.
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What is the ANSI B paper size also know as?
Answer:
ANSI A sized paper is commonly referred to as Letter and ANSI B as Ledger or Tabloid.
Explanation:
Faster air movement over an airfoil creates a _________ pressure field, which in turn allows lift.
a
Higher
b
Lower
Hai
Your answer will be A.
If you lower the Air Pressure your Object will Float Down ward. The Air Pressure allows it to Fly.
The pressure field created by faster air movement over an airfoil is; A: higher
What is pressure field?When the air hits the front of the wing, the air will flow in a steeper curve upward, than the bottom wing flow which will lead to the creation of a vacuum on top of the wing that pulls more air towards the top of the wing.
Finally, this air above does the same thing but it will move faster as a result of the vacuum pulling it in, and as such the vacuum now lifts the wing. Thus, Faster air movement over an airfoil creates a higher pressure field.
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Member AB is d = 6.7 m long, made of steel, and is pinned at its ends for y-y axis buckling and fixed at its ends for x-x axis buckling. Determine the maximum load P the frame can support without buckling member AB. Express your answer to three significant figures and include appropriate units.
To determine the maximum load P that the frame can support without buckling member AB, we need to consider the critical buckling loads for both y-y axis and x-x axis buckling.
For y-y axis buckling, the critical buckling load can be calculated using the formula: P_yy = (π² * E * I_yy) / (L_yy)²
Where E is the modulus of elasticity of the steel, I_yy is the moment of inertia of member AB about the y-y axis, and L_yy is the effective length of member AB for y-y axis buckling.For x-x axis buckling, the critical buckling load can be calculated using the formula: P_xx = (π² * E * I_xx) / (L_xx)²
Where I_xx is the moment of inertia of member AB about the x-x axis, and L_xx is the effective length of member AB for x-x axis buckling.
Since member AB is pinned at its ends for y-y axis buckling and fixed at its ends for x-x axis buckling, the effective lengths are different. We'll need to determine the effective lengths L_yy and L_xx.
Once we have the critical buckling loads P_yy and P_xx, the maximum load P that the frame can support without buckling member AB is given by: P = min(P_yy, P_xx)
To calculate the values, we would need specific information such as the cross-sectional properties of member AB (I_yy and I_xx), the modulus of elasticity of the steel (E), and the effective lengths (L_yy and L_xx). Without these specific details, we cannot provide a numerical answer.
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The frequency response of a system is given as Vout/Vin= jωL / (( jω)2+ jωR+L). If L=2 H and R=1 Ω , then what is the magnitude of the response at 70Hz?
A. 14.3×10-³
B. 10π
C. 0.5π
D. 4.55×10-³
The magnitude of the response at 70Hz for the given system with L=2 H and R=1 Ω is 0.5π.
To find the magnitude of the response at 70Hz, we need to substitute the given values into the given equation for frequency response. First, we can simplify the equation by dividing both numerator and denominator by jω. This gives us Vout/Vin = L / (jω + R/L + (1/ωL)). Now, we can substitute L=2H and R=1Ω. Plugging in ω = 2πf = 2π(70) = 140π, we get Vout/Vin = 2 / (j140π + 1/2π + 1/140π)). Simplifying this expression and taking the magnitude, we get 0.5π as the answer. Therefore, the correct option is C.
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If you use the function with a single parameter of 50 , which integers will be included in the resulting iterable? 1 through 50, inclusive 0 through 49 , inclusive 0 through 50, inclusive 0 through 50 , exclusive
If the function is called with a single parameter of 50, the resulting iterable will include integers from 0 through 49, inclusive.
In most programming languages, when specifying a range or interval, the starting value is inclusive, while the ending value is exclusive. This means that the range will include all values starting from the initial value and ending one element before the specified end value.
In this case, since the parameter is 50, the function will generate an iterable that includes integers starting from 0 and ending at 49 (inclusive). The number 50 will not be included in the resulting iterable.
It is important to clarify the behavior of the function, especially when dealing with range or interval operations, as the inclusivity or exclusivity of the start and end values can affect the expected output.
By specifying that the range is inclusive for 0 through 49, it ensures that all integers within that range will be included in the resulting iterable, while excluding the value of 50.
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Write down the initial value problem that models the heat transfer in an infinitely long rod. Assume that the rod is exchanging heat with the surrounding medium (convection), the coefficient of convection is k, the heat specific of the rod is 1 , and the initial temperature is given by f(x).
The initial value problem that models the heat transfer in an infinitely long rod with convection can be represented as follows:
∂u/∂t = k * ∂²u/∂x²
where:
u(t, x) represents the temperature distribution in the rod at time t and position x.
k is the coefficient of convection.
∂u/∂t represents the rate of change of temperature with respect to time.
∂²u/∂x² represents the second derivative of temperature with respect to position, which accounts for the spatial variation of temperature in the rod.
In addition to the partial differential equation, we also need to specify the initial condition:
u(0, x) = f(x)
where:
f(x) represents the initial temperature distribution along the rod at time t=0.
Together, the partial differential equation and the initial condition form the initial value problem that models the heat transfer in the infinitely long rod with convection.
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Mention any four thermodynamic properties.
Answer:
They are pressure, temperature, volume, entropy, internal energy, enthalpy, Gibbs function and Helmholtz functions
Explain two reason why it is important for DG08 Engineering to refer to electronic component pin configuration specifications when designing and building printed circuit boards?
Answer:
refer to aja
Explanation:
BMW chose to use thermoplastic polymers (TP) for the side panels of all of its cars due to their superior performance over the product lifecycle. 1. True, 2. False
A technique for measuring the environmental effects connected to a specific product is life cycle analysis (LCA).
Given statement is True.
What is Life-Cycle Analysis?A key tool for assisting decision-making for sustainable development is life-cycle analysis (LCA), also referred to as life-cycle assessment.LCA is a tool used to assess potential environmental effects of a product, material, process, or activity, according to the US Environmental Protection Agency.Importantly, an LCA is a thorough method for evaluating all direct and indirect environmental impacts across the full life cycle of a product system, from material acquisition to manufacturing to use to final disposal.Applying LCA encourages environmentally responsible product and process design and redesign, which reduces overall environmental impacts and the use and release of toxic or nonrenewable materials.The most significant impacts on resource demand and human health are identified by LCA studies of key materials and processes throughout the life cycles of the products.Decision-makers can choose the best option because these analyses outline all of the advantages and disadvantages of a product or procedure.To Learn more About product lifecycle refer to:
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explain why the sequence of drilling, boring, and reaming produces a hole that is more accurate than drilling and reaming it only.
The sequence of drilling, boring, and reaming produces a hole that is more accurate than just drilling and reaming due to a combination of processes that refine and enhance the precision of the hole. Each step in the sequence contributes to improving the hole's accuracy, roundness, and surface finish.
1) Drilling is the initial process, which creates a rough hole in the material. This step often leaves uneven surfaces and an inaccurate hole diameter due to the drill bit's inherent limitations, such as deflection and wear.
2) Boring is the next step, which enlarges the hole to a more precise diameter using a single-point cutting tool. The boring process ensures a smoother, rounder, and more concentric hole compared to the initial drilled hole. Boring also allows for fine adjustments to the hole size, resulting in a more accurate dimension.
3)Finally, reaming further refines the hole's accuracy, roundness, and surface finish. The reamer, a multi-fluted cutting tool, removes a small amount of material from the hole's walls, correcting any remaining irregularities from the previous steps. Reaming also helps achieve tighter tolerances and better surface finish compared to just drilling and boring.
4)In conclusion, the sequence of drilling, boring, and reaming provides a more accurate hole due to the combined benefits of each process. Boring and reaming help eliminate inaccuracies and imperfections caused by the drilling process, resulting in a precise, round, and smooth hole that meets tighter tolerances and requirements.
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When measuring a Brake Drum, the Brake Micrometer is set to a Base Drum Diameter of 10 Inches plus four notches, and the dial reads 22. What is the diameter of this drum
diameter of this drum?
Answer:
10.5
Explanation:
Measuring a Brake Drum, the Brake Micrometer is set to a Base Drum Diameter of 10 Inches plus four notches, and the dial reads 22. Diameter of the drum is 10.5.
What is diameter?
Any straight line segment that cuts through the center of a circle and has ends that are on the circle is considered a circle's diameter in geometry. It is also known as the circle's longest chord.
The diameter of a sphere can be defined using either of the two methods. In more recent usage, the diameter can also refer to a diameter's length, or displaystyle d.
As opposed to a diameter, which refers to the line segment itself, one uses the term "diameter" in this context since all diameters of a circle or sphere have the same length, which is equal to twice the radius "displaystyle r.
Therefore, Measuring a Brake Drum, the Brake Micrometer is set to a Base Drum Diameter of 10 Inches plus four notches, and the dial reads 22. Diameter of the drum is 10.5.
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The ultimate BOD of a river at the confluence of the river and a sewage outfall is 50 mg/L and the DO is at the saturation value of 9.0 mg/L after mixing. The deoxygenation (or decay) rate coefficient (Kd) is 0.3 d-1 and the reaeration rate coefficient (Kr) is 0.9 d-1. The river is flowing at a velocity of 48 miles/day and the only source of BOD is from the sewage discharge.
Required:
a. Find the critical distance downstream (in miles) at which DO is a minimum.
b. Find the minimum DO (in mg/L)
c. If a wastewater treatment plant is to be built, what fraction of the BOD would have to be removed from the sewage to assure a minimum of 5.0 mg/L everywhere downstream?
Answer:
c
Explanation:
the answer is A,C
i did it already
A simply supported beam of square cross section, is subject to a moment 51 kNm. The beam is of uniform sectional and geometric properties, with an E value of 201 GPa. If the radius of curvature of the beam under the action of the applied bending moment is 142147 mm,
what is the dimensional value of the beam's cross-section, that would be squared to determine its cross-sectional area?
Present your answer in millimeters, to three decimal places.
The dimensional value of the beam's cross-section, which would be squared to determine its cross-sectional area, is 2010 mm².
To find the dimensional value of the beam's cross-section, we can use the formula for the moment of inertia (I) of a square cross-section beam, which is given by (b * h³) / 12, where b is the base length and h is the height of the square cross-section.
Since the beam is subject to a bending moment, we can relate the moment of inertia (I) to the radius of curvature (R) using the formula I = E * (b * h³) / 12 * R, where E is the Young's modulus.
Rearranging the equation, we can solve for (b * h³), which represents the dimensional value of the beam's cross-section squared: (b * h³) = (12 * I * R) / (E).
Substituting the given values, I = 51 kNm, R = 142147 mm, and E = 201 GPa (or 201000 MPa), we can calculate the dimensional value of the cross-section squared: (b * h³) = (12 * 51 kNm * 142147 mm) / (201000 MPa).
Calculating the right side of the equation, we find that (b * h³) is approximately equal to 8590800 mm⁴.
To determine the dimensional value of the beam's cross-section, we need to find the square root of (b * h³), which gives us √(8590800 mm⁴) ≈ 2930 mm².
Therefore, the dimensional value of the beam's cross-section, which would be squared to determine its cross-sectional area, is 2010 mm².
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can you give me a paragraph on What is Electrical Engineering and why is it considered the largest branch of Engineering? I really need help.