Their HVACR technician advises against it because of the residential energy costs from HVAC units.
hat is the cost energy?
Energy Cost is known to be a term that connote the cost of electricity and this is one that is often related to fuel oil, gasoline, heating oil, natural gas, as well as other kinds or source of energy linked to any operation.
Hence, Since family in Florida heard about evaporative coolers as a way to cool their home without the expenses of a refrigerated air conditioning system. Their HVACR technician advises against it because of the residential energy costs from HVAC units.
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gradual process by which machines replaced hand tools
The Industrial Revolution refers to the gradual process by which machines replaced hand tools in the early 1800s.
What is Industrial Revolution?
The Industrial Revolution was a period of significant change from the mid-18th century to the mid-19th century, characterized by the transition from hand-based to machine-based manufacturing, increased agricultural productivity, and new developments in transportation.
The growth of iron and textile industries marked the beginning of this era, which spread throughout Britain and eventually to other countries in Europe and North America. It brought about massive changes in the way goods were produced, leading to higher levels of efficiency and a shift from a agrarian to an industrialized economy, transforming the lives of millions of people and setting the stage for the modern era.
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What are the three tasks of the control plane and the corresponding SDN abstractions?
The control plane and SDN abstractions work together to provide a centralized, programmable approach to network management, allowing network administrators to more efficiently manage and optimize their networks.
The control plane is responsible for three main tasks in a Software-Defined Networking (SDN) architecture. The first task is network topology discovery, where the control plane learns about the network topology and the available network devices. The second task is policy management, where the control plane manages network policies and rules. Finally, the third task is traffic engineering, where the control plane optimizes traffic flows across the network. To perform these tasks, SDN abstractions are used. The first abstraction is the network topology abstraction, which provides a high-level view of the network topology. The second abstraction is the policy abstraction, which defines network policies and rules. The third abstraction is the traffic engineering abstraction, which provides a way to optimize traffic flows across the network.
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can you solve this question pls i cant solve
Note that no drug will precipitate from the solution upon cooling it to 40°C.
What is the explanation for the above response?Amount of drug in saturated solution at 80°C = 1000 g
Solubility of drug at 80°C = 2.5 g B 100-1 g-1 water
Therefore, the amount of water present in the solution at 80°C = 1000 g / (2.5 g B 100-1 g-1 water) = 40000 g
Amount of drug in saturated solution at 40°C = 1000 g
Solubility of drug at 40°C = 0.36 g B 100-1 g-1 water
Therefore, the amount of water present in the solution at 40°C = 1000 g / (0.36 g B 100-1 g-1 water) = 2777.78 g
The amount of drug that will precipitate = amount of drug in initial solution - amount of drug in solution at 40°C
= 1000 g - (0.36 g B 100-1 g-1 water * 2777.78 g) = 1000 g - 1000 g = 0 g
Therefore, no drug will precipitate from the solution upon cooling it to 40°C.
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The main target of the diplexer is to enable the antenna to work at different frequencies. *
True
False
True is the answer.....
A student places a piece of a potato into a container of hydrogen peroxide. One observation the student makes is that bubbles form around the potato. The presence of bubbles might indicate the formation of a new substance because bubbles
a - Group of answer choices always rise to the top of a liquid.
b- are almost always perfectly spherical.
c- could show that a gas is forming.
d- usually burst after a few minutes.
The angle of attack of a wing directly controls the A) angle of incidence of the wing. B) amount of airflow above and below the wing. C) distribution of pressures acting on the wing.
The angle of attack of a wing directly controls the C) distribution of pressures acting on the wing.
When the angle of attack of a wing is increased, the air moving over the curved upper surface of the wing must travel a greater distance and faster than the air moving beneath the wing's flat lower surface. This creates an area of lower air pressure above the wing and an area of higher air pressure beneath the wing, resulting in lift. The greater the angle of attack, the greater the lift produced.
However, if the angle of attack is too great, the airflow over the wing may separate, causing a loss of lift and potentially leading to a stall. Therefore, proper control of the angle of attack is crucial for safe and efficient flight.
Option C is answer.
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start solving the circuit by assuming the bjt is in cut-off mode. that means i subscript b equals 0 and v subscript b e end subscript less than 0.7. write a kvl in the base-emitter loop and replace i subscript b with zero, and find v subscript b e end subscript. is this transistor in cut-off? if not, assume it is in active mode. that means i subscript c equals beta i subscript b and v subscript c e end subscript greater or equal than 0.7. calculate i subscript c. write a kvl equation for the collector-emitter loop. calculate v subscript c e end subscript. is this transistor in active mode? if not, assume it is in saturation. that means i subscript c less than beta i subscript b and v subscript c e end subscript equals 0.2 space v. use the collector-emitter kvl and v subscript c e end subscript equals 0.2 space v to find i subscript c. compare the calculated i subscript c with beta i subscript b. is this transistor in saturation?
Assuming the BJT is in cut-off mode, the base-emitter loop can be written as: VBE + IB * RE = 0. Solving for IB yields IB = -VBE/RE. Since VBE is less than 0.7V, IB is greater than zero, so the transistor is not in cut-off mode.
Assuming the transistor is in active mode, the collector current is IC = βIB, where β is the current gain of the transistor. The collector-emitter loop can be written as VCC - ICRC - VCE = 0. Solving for VCE yields VCE = VCC - ICRC. Since VCE is greater than or equal to 0.7V, IC is less than βIB, so the transistor is not in active mode.
Assuming the transistor is in saturation, the collector current is IC = βIB - ICESAT. The collector-emitter loop can be written as VCC - ICRC - VCE = 0. Solving for VCE yields VCE = VCC - ICRC. Since VCE is equal to 0.2V, IC is equal to βIB - ICESAT, so the transistor is in saturation.
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Special impact sockets and extensions are easily
identified because they are:
(A) chrome.
(B) aluminum.
(C) flat black
Durant la sto
(D) hard rubber.
les
Answer:
C
Explanation:
they are flat black
QUESTION:
When cutting oddly shaped materials, the goal is to:
When cutting oddly shaped materials, the goal is to give the blade as uniform a width as possible throughout the entire distance of cut.
What are oddly shaped material?Changing the location of an odd-shaped piece of material in the vise can minimize resistance and increase cutting rate. Remember that the idea is to keep the blade as consistent as possible over the whole length of the cut.
Irregular forms have sides and internal angles that are not all the same. They can be more difficult for youngsters to identify since they do not resemble the traditional forms they are used to seeing when they are first exposed to shapes. Regular forms, on the other hand, have sides that are all the same length and equal angles, making them a little easier to detect.
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For convenience, one form of sodium hydroxide that is sold commercially is the saturated solution. This solution is M, which is approximately by mass sodium hydroxide. What volume of this solution would be needed to prepare L of M solution
Sodium hydroxide, NaOH, is a very useful compound in the chemical industry. Sodium hydroxide is used to make soap, detergent, paper, and many other products. It is also used to clean drains, dissolve grease, and other materials.
For commercial convenience, one form of sodium hydroxide that is sold commercially is the saturated solution. This solution is M, which is approximately by mass sodium hydroxide.
To prepare L of M solution, we must first find the number of moles of NaOH that will be required.
Then we will find the volume of the saturated solution that is required to make this solution.
To find the number of moles of NaOH that will be required, we will use the formula:
\(N = C x V\)Where, N = number of moles of NaOH, C = concentration of the solution, and V = volume of the solution.
In this case, C = M, which is the concentration of the solution that we want to make. And V = L, which is the volume of the solution that we want to make.
So,
\(N = M x LV = N / MC = 40% = 40 / 100 = 0.4 M\)
Volume of the saturated solution required to prepare the M solution:
\(V = N / MV = 4.69 L\)
We will require approximately \(4.69 L\)of the saturated solution to prepare L of M solution.
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water (10 oc) flows with a speed of 2 m/s through a horizontal run of pvc pipe. the length of the pipe is 50 m, and the pipe is schedule 40 with a nominal diameter of 2.5 inch. calculate: a) the pressure drop in kpa b) the head loss in meters c) the power in watts needed to overcome the head loss
The pipe is schedule 40 and has a nominal diameter of 2.5 inches. It is 50 meters long. Then pressure drop is 29.1kpa,Head loss is 2.967m and power is 176.986 watt.
a)Pressure drop = 32μVL/D²
=32*1.307*10⁻³*2*50/0.0119882
=29102.6 pascal
=29.1 Kpa
b)Head loss=p1-p2/pg=29.1*10³/999.7*9.81
=2.967 m
c)power=(p1-P2)q
=29.1*10³*6.082*10⁻³
Power =176.986 watt //watt is the unit of power
The difference in total pressure between two points on a network used to transport fluids is known as a pressure drop. When frictional forces acting on a fluid as it flows through the tube, brought on by the resistance to flow, occur, a pressure drop happens.
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The term
refers to using more than one method to join structural body parts on a vehicle.
a. plasma arc cutting
c. brazing
b. hybrid bonding
d. soldering
In seismic areas, the most crucial requirement for precast concrete is:
1) not to build higher than two stories.
2) to tie elements together laterally.
3) to make ductile concrete beams.
O 4) to use only steel columns.
5)
precast concrete cannot be used in seismic zones.
Answer:
Option 2, In seismic areas, the most crucial requirement for precast concrete is to tie elements together laterally
Explanation:
In seismic areas, the in-plane lateral forces are very larger and hence in order to restrict the lateral movement governed by the lateral force, lateral ties are essential .
Specific design detailing such as interior and perimeter ties in the floors causes diaphragm behavior and hence distribute the load evenly without any movement.
Hence, option 2 is correct
Hey guys can anyone list chemical engineering advancement that has been discovered within the past 20 years
Briefly explain thermal expansion using the potential energy–versus–interatomic spacing curve.
As the temperature of the material increases, the potential energy of the molecules increases. Thermal expansion occurs due to changes in temperature, and interatomic distances increase as potential energy increases.
What are the uses of Thermal Expansion?Thermal expansion is used in a variety of applications such as rail buckling, engine coolant, mercury thermometers, joint expansion, and others.
It is to be noted that an application of the concept of liquid expansion in everyday life concerns liquid thermometers. As the heat rises, the mercury or alcohol in the thermometer tube moves in only one direction. As the heat decreases, the liquid moves back smoothly.
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Determine the force in each member of the loaded truss. Explain why knowledge of the lengths of the members is unnecessary. 3720 lb 52°, с Answers: AB lb AC lb lb
The force in member AB is 2000 lb and the force on BC is 3464 lb.
How to calculate the ForceMethod of joints, at every joint equilibrium equation Sxco and sty=0 are enough to calculate forces in members. Hence, Lengths are not required.
The force in member AC is:
= 2000 cos 30° + FAC = 0
FAC = 1732
The force in AC is 1732 × 2 = 3464 lb.
In conclusion, the force in member AB is 2000 lb and the force on BC is 3464 lb.
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1. types of ecosystem ?
2. explain each ecosystem
What is the process of a Diesel engine uses to convert fuel to mechanical energy
Answer:
A diesel engine is a type of heat engine that uses the internal combustion process to convert the energy stored in the chemical bonds of the fuel into useful mechanical energy. ... First, the fuel reacts chemically (burns) and releases energy in the form of heat.
How many design did it take to make the eiffel tower?
Answer:
search is up
Explanation:
hope this helps!
I need help with part (C). Pleasee help me. It’s due in a few hours.
Answer:
u do the same thing as part B but only add 100 k, I think, cuz I'm still in middle school but I mean if u see it asks u to do the same thing as B but C says that instead, u do it at half pressure and 100 k is higher temp so what its asking is to repeat b but the twist is u do it at half pressure and 100 k is the higher temp
hope this helps :)
A producer is someone who _____________.
A.
Makes a commodity available for sale or exchange
B.
Buys or trades in order to receive a commodity
C.
Is in the market for a commodity
D.
Receives a commodity from a business
Answer: A. Makes a commodity available for sale or exchange
Explanation: hope it helps ^w^
Which of the following is always VALID? Choose ONE or MORE answers.
A. B. ΔS = ∫ dQ/T, where dQ is the heat transfer
C. , where TC and TH are the cold and hot temperatures, respectively, and is the coefficient of performance for any refrigerator.
D. for any gas
E. for any systems in equilibrium
F. where and are the specific/molar enthalpies relating to a change of state from state 1 to state 2
G. Z = 1 +
The valid statements among the options are: A. ΔS = ∫ dQ/T, where dQ is the heat transfer, E. ΔS ≥ 0 for any systems in equilibrium, F. ΔH = H2 - H1, where ΔH and ΔS are the specific/molar enthalpies relating to a change of state from state 1 to state 2
These statements are fundamental principles in thermodynamics. Statement A represents the second law of thermodynamics, which relates the change in entropy (ΔS) to heat transfer (dQ) and temperature (T). Statement E reflects the second law of thermodynamics again, stating that the entropy of an isolated system or systems in equilibrium never decreases. Statement F defines the change in enthalpy (ΔH) as the difference in specific/molar enthalpies between two states.
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The mass of a muon is 207 times the electron mass; the averagelifetime of muons at rest is 2.20 μs. In a certainexperiment, muons moving through a laboratory are measured to havean average lifetime of 6.85 μs. For the movingmuons, whatare (a)β(b)K,and (c)p (in MeV/c)?The rest energy of the electron is 0.511 MeV.
For moving muons in the given scenario, the values of β, K, and p are 0.824, (pc² / 104.977 MeV/c²), and √[(K + m0c²)²/c⁴ - m0²c²/c⁴] / c, respectively. These values are obtained through calculations using the provided data and relevant formulas.
The mass of a muon is 207 times the electron mass; the average lifetime of muons at rest is 2.20 μs. In a certain experiment, muons moving through a laboratory are measured to have an average lifetime of 6.85 μs.
The rest energy of the electron is 0.511 MeV. Formulas:Total energy of the particle: E = (m²c⁴ + p²c²)¹/², Where,
E = Total energy of the particle m = Rest mass of the particlec = Speed of light in vacuum p = Momentum of the particleβ = v/c, Where, β = Velocity of the particle/cK = Total Kinetic Energy of the particleK = E - mc²p = Momentum of the particle p = mvTo calculate the value of β for moving muons, we need to calculate the velocity of the muons. To calculate the velocity of the muons, we can use the concept of the lifetime of the muons. The average lifetime of muons at rest is 2.20 μs.
The moving muons have an average lifetime of 6.85 μs. The time dilation formula is given byt = t0 / (1 - β²)c², where,
t = Time interval between the decay of the muon measured in the laboratory.t0 = Proper time interval between the decay of the muon as measured in the muon's rest frame.c = Speed of light in vacuumβ = Velocity of the muon.Hence,t0 = t / (1 - β²)c²t0 = 2.20 μs / (1 - β²)c²t = 6.85 μs. From these two equations, we can calculate the value of β.6.85 μs / t0 = 6.85 μs / (2.20 μs / (1 - β²)c²)β² = 1 - (2.20 μs / 6.85 μs)β² = 0.679β = 0.824. Hence, the value of β is 0.824.
To calculate the value of K for moving muons, we need to calculate the total energy of the muons. The rest mass of the muon is given bym0 = 207 × 0.511 MeV/c²m0 = 104.977 MeV/c².
The total energy of the muon is given byE = (m²c⁴ + p²c²)¹/²E = (104.977 MeV/c²)²c⁴ + (pc)²K = E - m0c²K = [(104.977 MeV/c²)²c⁴ + (pc)²] - (104.977 MeV/c²)c²K = pc² / (104.977 MeV/c²). Hence, the value of K for moving muons is pc² / (104.977 MeV/c²).
To calculate the value of p for moving muons, we can use the value of K calculated in p = √(E²/c⁴ - m0²c²/c²) / cHere,E = (m²c⁴ + p²c²)¹/²E²/c⁴ = m²c⁴/c⁴ + p²p²c²/c⁴ = (K + m0c²)²/c⁴p = √[(K + m0c²)²/c⁴ - m0²c²/c⁴] / c. Hence, the value of p for moving muons is √[(K + m0c²)²/c⁴ - m0²c²/c⁴] / c.
Therefore, the values of β, K, and p are 0.824, (pc² / 104.977 MeV/c²), and √[(K + m0c²)²/c⁴ - m0²c²/c⁴] / c respectively.
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The rate or speed at which work is performed is called what?
Select one:
Answer:
What are you talking about? pls explain and then maybe I can help.
A 100-mL water sample is collected from the activated sludge process of municipal wastewater treatment. The sample is placed in a drying dish (weight = 0.5000 g before the sample is added), and then placed in an oven at 104 degree C until all the moisture is evaporated. The weight of the dried dish is recorded as 0.5625 g. A similar 100-mL sample is filtered and the 100-mL liquid sample that passes through the filter is collected and placed in another drying dish (weight of dish before sample is added is also 0.5000 g). This sample is dried at 104 degree C and the dried dish's weight is recorded as 0.5325 g. Determine the concentration (in mg/L) of total solids, total dissolved solids, total suspended solids, and volatile suspended solids, (Assume that VSS = 0.7 times TSS.)
The concentrations are as follows:
Total solids (TS): 625 mg/L
Total dissolved solids (TDS): 300 mg/L
Total suspended solids (TSS): 325 mg/L
Volatile suspended solids (VSS): 227.5 mg/L
To calculate the concentrations of total solids (TS), total dissolved solids (TDS), total suspended solids (TSS), and volatile suspended solids (VSS), we need to use the given weights and volumes.
First, let's calculate the weight of solids in the original sample:
Weight of solids in the original sample = Weight of dried dish with sample - Weight of dried dish without sample
= 0.5625 g - 0.5000 g
= 0.0625 g
Next, let's calculate the concentration of total solids (TS):
Concentration of TS = (Weight of solids in the original sample / Volume of sample) x 1000
= (0.0625 g / 100 mL) x 1000
= 625 mg/L
To calculate the concentration of total dissolved solids (TDS), we need to subtract the weight of suspended solids from the weight of total solids:
Weight of suspended solids = Weight of dried dish with filtered sample - Weight of dried dish without sample
= 0.5325 g - 0.5000 g
= 0.0325 g
Weight of dissolved solids = Weight of total solids - Weight of suspended solids
= 0.0625 g - 0.0325 g
= 0.0300 g
Concentration of TDS = (Weight of dissolved solids / Volume of sample) x 1000
= (0.0300 g / 100 mL) x 1000
= 300 mg/L
To calculate the concentration of total suspended solids (TSS):
Concentration of TSS = (Weight of suspended solids / Volume of sample) x 1000
= (0.0325 g / 100 mL) x 1000
= 325 mg/L
Finally, to calculate the concentration of volatile suspended solids (VSS):
Concentration of VSS = 0.7 x Concentration of TSS
= 0.7 x 325 mg/L
= 227.5 mg/L
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4. Which of the following is a mechanical property of a material? Conductivity o Strength Heat resistivity Weight
Answer:
The Mechanical Properties include Elasticity, Plasticity, Ductility, Malleability, Hardness, Toughness, Brittleness, Tenacity, Fatigue, Fatigue resistance, Impact Resistance property, Machineability, Strength, Strain Energy, Resilience, Proof Resilience, Modulus of Resilience, Creep, Rupture, and Modulus of Toughness.
locate the centroid of the shaded area between the two curves
9514 1404 393
Answer:
(x, y) = (5.76, 1 5/7)
Explanation:
The location of the centroid in the x-direction is the ratio of the first moment of area about the y-axis to the total area. Similarly, the y-coordinate of the centroid is the first moment of area about the x-axis, divided by the area.
For the moment about the y-axis, we can define a differential of area as ...
dA = (y2 -y1)dx
where y2 = √(x/k2) and y1 = k1·x^3
The distance of that area from the y-axis is simply x.
So, the x-coordinate of the centroid is ...
\(\displaystyle c_x=\frac{a_x}{a}=\frac{\int{x\cdot dA}}{\int{dA}}\\\\a_x=\int_0^{12}{x(k_2^{-1/2}\cdot x^{1/2}-k_1x^3)}\,dx=\frac{2}{5k_2^{1/2}}\cdot12^{5/2}-\frac{k_1}{5}12^5\\\\a=\int_0^{12}{(k_2^{-1/2}\cdot x^{1/2}-k_1x^3)}\,dx=\frac{2}{3k_2^{1/2}}\cdot12^{3/2}-\frac{k_1}{4}12^4\\\)
For k1 = 4/12^3 and k2=12/4^2, these evaluate to ...
\(a_x=115.2\\a=20\\c_x=5.76\)
The y-coordinate of the centroid requires we find the distance of the differential of area from the x-axis. We can use (y2 +y1)/2 for that purpose. Then the y-coordinate is ...
\(\displaystyle c_y=\frac{a_y}{a}\\\\a_y=\int_0^{12}{(\frac{y_2+y_1}{2}(y_2-y_1))}\,dx=\frac{1}{2}\int_0^{12}{(\frac{x}{k_2}-(k_1x^3)^2)}\,dx\\\\a_y=\frac{12^2}{4k_2}-\frac{k_1^212^7}{14}=\frac{240}{7}\\\\c_y=\frac{12}{7}\approx1.7143\)
The centroid of the shaded area is ...
(x, y) = (5.76, 1 5/7)
you have a set of plans that require lighting fixtures (luminaires) to be installed on the celling directly above an indoor pool. the ceiling hight is 10 feet above the decking around the pool. you should make sure that these fixtures are
The lighting fixtures should be waterproof and properly sealed.
What are the essential requirements for the lighting fixtures above the indoor pool?Lighting fixtures installed above an indoor pool need to meet specific criteria to ensure safety and durability. These fixtures should be designed specifically for wet or damp environments and be rated as waterproof.
Water can create a hazardous situation if it comes into contact with electrical components, so the fixtures must have appropriate seals to prevent water ingress. Additionally, it's crucial to choose fixtures that are corrosion-resistant to withstand the humid environment around the pool.
The requirements for lighting fixtures in wet environments to ensure safety and longevity. Waterproofing and proper sealing are crucial to protect against electrical hazards and ensure the fixtures can withstand the pool's surroundings.
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limitations for deleterious materials in aggregates used for cement concrete
When driving a commercial motor vehicle safely, it is recommended that you leave at
least one second between your vehicle and the vehicle you are following for each
feet of your vehicle's length.
Answer:
If you are driving below 40 mph, you should leave at least one second for every 10 feet of vehicle length.