Entrapment and transfer of hear from the sun to a building without use of machinery : passive solar system
What are the three solar passive system?Distribution: The process by which solar heat is transferred from the locations of collection and storage to the various rooms in the house. The three natural heat transport modes—conduction, convection, and radiation—will be used entirely in a purely passive design.Absorber: The storage element's densely darkened, hard surface. The surface, which can be a stone wall, a floor, or a water container, is directly exposed to the sun. Heat is produced when sunlight strikes the surface.Thermal mass : substances that capture or store the heat produced by sunlight. The thermal mass is the substance beneath and below the exposed surface of the absorber.Aperture/Collector: The expansive glass area that lets light into the building. During the heating season, the aperture(s) should face within 30 degrees of true south and not be blocked by any other structures or trees from 9 a.m. to 3 p.m.Learn more about passive solar system refer to :
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PSPICE 6.23 MULTISIM Assume that the initial energy stored in the inductors of Figs. P6.23(a) and (b) is zero. Find the equiva- lent inductance with respect to the terminals a, b. Figure P6.23 (a) 12 mH 24 mH 10 mH 520 mH 30 mH 15 mH 9 mH3 8 mH (b) 25 uH 18 uH 20 uH 60 uH 30 H 1) UH 312 pH 15 pH 38 pH
A mass moving at a certain speed is comparable to an inductor conducting current. In other words, a coil carrying current stores energy
In its magnetic field, which equals 1/2 Li2, just like a moving mass has kinetic energy = 1/2 mv2. Actually, the magnetic field produced by the current passing through the inductor is where this energy is kept. The energy is stored without being lost in a pure inductor, where it is released back into the circuit when the inductor's magnetic field collapses and the current through it is ramped down. The charge Q and voltage V between the capacitor plates are related to the energy U C U C stored in a capacitor because it is electrostatic potential energy.
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A pull of 40 N inclined at 30° to the horizontal plane, is required just to move a body
placed on a rough horizontal plane. But the push required to move the body is 50 N. If
the push is inclined at 30° to the horizontal, find the weight of the body and co-efficient
of friction.
In mathematics, is equal to F/N, where F is the frictional force and N is the normal force.
What is coefficient of friction?The friction coefficient is the ratio of the normal force pressing two surfaces together to the frictional force preventing motion between the two surfaces. Greek letter mu () is typically used to represent it. In mathematics, is equal to F/N, where F is the frictional force and N is the normal force. The coefficient of friction is dimensionless because both F and N are expressed in units of force (such as newtons or pounds). For both static and kinetic friction, the coefficient of friction has different values. When an object experiences static friction, the frictional force resists any applied force, and the object stays at rest until the static frictional force is removed. In kinetic friction, the frictional force opposes the motion of the object.The coefficient of kinetic friction for a brick sliding on a clean wooden table is approximately 0.5, meaning that a force equal to half the weight of the bricks is needed to simply overcome friction in order to keep the bricks moving along at a constant speed. The coefficient of static friction is approximately 0.6. The frictional force itself is focused in the opposite direction of the object's motion.To Learn more About frictional force refer To:
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technician a says that the upper shell of a main bearing is identified by a marking on the back of the shell. technician b says that the upper main bearing shell will always have a hole in it. who is correct?
Technician b is correct that he says affirms that the top main bearing shell will always be pierced by a hole.
A housing, shaft, and lubricant are other parts of the system, which also contains a bearing shell. As a result, they must be developed in concert with the bearing shell as a part of a bearing system as the dependability of the bearing shells is dependent on these other components. Their main objective is to make this rotation of the components almost wear-free. Plain bearings consist of one or two bearing shells that are tightly secured within the bearing seat. The spinning shaft is encircled by the bearing shells at the bearing journals. A steel alloy shell serves as the foundation for every bearing insert, upon which the softer bearing componentsis connected. Bearings may currently be divided into two main categories: those made of aluminum alloy or copper/lead alloy.
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Where loads are likely to be on continuously, the calculated load for branch circuits and feeders must be figured at (100%) (125%) (150%) of the continuous load, (plus) (minus) the non-continuous load. This requirement generally (does) (does not) apply to residential wiring.
Where loads are likely to be on continuously, the calculated load for branch circuits and feeders must be figured at 125%.
Section 210.19(A)(1) permits the bigger of the two values listed below to be utilized as the connectors 's ultimate size for sizing an ungrounded branch circuit conductor:
Without any extra adjustments or corrections, either 125% of the continuous load, OR
When adjustment and corrective factors are applied, the load is 100% (not 125% as stated previously).
This will be the same in the 2020 NEC. The introduction of new exception 2 is what has changed. To comprehend this new exception, one must study it very carefully. A part of a branch circuit connected to pressure connectors (such as power distribution blocks) that complies with 110.14(C)(2) may now be sized using the continuous load plus the noncontiguous load instead of 125% of the continuous load thanks to the new exception.
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what does the following code segment do to the array? .data array byte 1, 1, 2, 3, 5, 8 .code mov ebx, offset array mov eax, 3 skip this: ad [eax], byte ptr 2 loop skip this: g
Byte ptr 2 loop skip this: g is the code segment do to the array.
What does an array segment mean?The array is separated into several segments that are all the same size and have additional shared memory space. The frequently changing digit (FCD) of a number is subjected to a preset condition when data is initialized to an array, resulting in the storage of each data item in a particular section of the array.The index can either be a number or a field containing a number, and it denotes the location of the element within the array (beginning from 1).A data structure called an array consists of a set of elements (values or variables), each of which is identifiable by an array index or key. Array types may be confused with or overlap with other data types that describe aggregation of values, such as lists and strings.To learn more about array refer to:
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very stiff clays that underlie the houston area are typically fissured. we often find that unconfined compression tests produce unreasonably low estimates of shear strength. why?
The maximum axial compressive stress that a cohesive soil specimen can withstand with no confining stress is known as unconfined compressive strength (UCS).
One of the quickest and least expensive ways to gauge the shear strength of clayey soil is the unconfined compression test. The unconfined compression test is the most popular method of soil shear testing because it is one of the fastest and least expensive methods of measuring shear strength. It is used primarily for saturated, cohesive soils recovered from thin-walled sampling tubes. The primary purpose of the Unconfined Compression Test is to quickly determine a measure of the unconfined compressive strength of rocks or fine-grained soils that possess sufficient cohesion to permit testing in the unconfined state.
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which of the following is true for an npn bjt ? select one: a. the base current consists of mostly holes b. a p-type base is sandwiched between an n-type emitter and an n-type collector c. current flows primarily because of electrons injected into the base d. all of these e. current flows when either vbe or vbc are positive voltages
For an NPN , the base current is primarily made up .
Which of the following statements is accurate about a npn transistor's active region?The potential difference between the collector and the base is always less than 0.4 V, and the base current and collector current are directly proportional to one another.
What are two defining characteristics?Based on the types of the three main terminals, can be divided into NPN and PNP types. An NPN transistor is made up of two semiconductor junctions with a thin p-anode region, and a PNP transistor is made up of two semiconductor junctions with a thin n- cathode region.
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3) largest cluster of ones. assume in figures h7p3 we need to count the largest group of consecutive ones (instead of leading ones that we did in hw6, p3). for example if x
We must first transform the documents into numerical features in order to work with text data.
We will employ sparse matrices for the remaining tasks in the assignment. A sparse matrix is one that only contains a few nonzero entries. To reduce space and speed up calculation, a useful data structure for sparse matrices would only keep the nonzero values. A sparse matrix library that is well efficient is included in SciPy. For SciPy sparse matrices, many matrix function that are accessible for NumPy arrays are also available.
Dictionary format is first converted to the SciPy sparse matrix format. You can skip the next block and treat the function as a black box if you'd like, but we provided plenty of comments for those who are interested.
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which of the following describe the attributes that extended acls can use to filter network traffic? (select two.) answer extended acls can filter net
Extended ACLs can filter network traffic based on destination hostname or host IP address.
Extended ACLs can filter network traffic based on source protocol (i.e., IP, TCP, UDP, etc.).
What is meant by network traffic ?Network traffic is the amount of data moving through a network at any given moment. Data traffic or simply "traffic" are several names for network traffic. Traffic to a network can be classified as direct, organic, or paid in search engine optimization.
When a network is swamped with more data packet traffic than it can handle, network congestion results. When there are too many simultaneous communication and data requests made over a network with insufficient network bandwidth, data traffic backs up.
Data transfer via the internet is known as IP traffic. Web traffic is yet another name for IP traffic. Since servers—which are used to host websites
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a 4-bit dac must have an 8.00-v output when all inputs are high. find the required reference voltage. (3 pts)
Depends on the input and the reference voltage. Voltage is 1.250V
What is the output of the 4-bit DAC?Given a 4-bit digital input d and a reference voltage r, output voltage will be roughly Vout=din16Vref
The digital input d will be a 4-bit binary number presented to the DAC as 4 1-bit digital signals connected to the 4 digital input pins. Each signal will be either “hi” (binary 1, typically 5 volts), or “lo” (binary “0”, typically 0 volts).
The digital input pins are typically labeled in the data sheet for the DAC as D0 (20
bit), D1 (21 bit), D2 (22 bit), D3 (23bit).
So if we consider each input pin, D0 through D3, to be a single-bit binary number (0 or 1), then the output voltage would be given by Vout=8D3+4D2+2D1+D016Vref
.For example, if D3D2D1D0 = 0100b
and Vref is 5V, then Vout=0100b16Vref=4165
V=1.250V
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what would be considered a higher-than-normal tempertaure for a discharge gas line on a reciprocating compressor
Any compressor's discharge temperature cannot exceed 225 degrees F. if the discharge temperature rises above 225 degrees.
What temperature should a reciprocating compressor's discharge gas line be at?However, many compressor packages will contain components that limit discharge temperature to no more than 148.9°C (300°F). In general, it is advised to never exceed operating discharge temperatures of 176.7°C (350°F).
What are the likely reasons why the compressor discharge has an excessively high discharge pressure?The primary cause of high condensing pressure is high discharge pressure. High condensing pressure can be caused by insufficient condenser heat dissipation, condenser fouling, insufficient cooling air or water volume, and high cooling water or air temperature.
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7.124 the cylindrical tank ab has an 8-in. inner diameter and a 0.32-in. wall thickness. it is fitted with a collar by which a 9-kip force is applied at d in the horizontal direction. knowing that the gage pressure inside the tank is 600 psi, determine the maximum normal stress and the maximum shearing stress at point k
No, generally it is not. It could be zero for specific loading conditions. Since they are equal but with opposite signs then their average is zero.
For example, if you put a stress element under tension in the x direction and compress it in the y direction with equal stresses such as sigma_x=sigma_y, this will give you a stress element if rotated by 45 degrees will give you the maximum shear planes with zero normal stresses. So generally that's not the case. The general case is that you will get the average normal stress when you get the maximum shear stress. In the example I mentioned before if we consider the compression and tension natures of the stresses, we assumed then sigma_y should be negative because it's compression and sigma_x is positive because it's tension.
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g the spacecraft is performing a maneuver to get it in line of sight of its mission objective. the maneuver is an attitude change where the components of angular velocity in the body axis system remain constant.
Radians per second (rad/s) are the measurement of angular velocity.
What is Angular Velocity?Given that it only applies to objects moving in a circular path, it is less frequent than linear velocity. Examples of angular velocity include a roulette ball on a roulette wheel, a race car traveling in a circle, and a Ferris wheel.Additionally, the object's angular displacement with respect to time is represented by the object's angular velocity. Additionally, the central angle that corresponds to an object's location on a circle changes as it moves along a circular path. In addition, the angular velocity, denoted by the letter w, is the rate of change of this angle with respect to time.Consider a Ferris wheel that rotates pi / 6 (pi / 6) radians every minute. The resulting angular velocity of the Ferris wheel would be pi / 6 (pi / 6) radians per minute.To Learn more About angular velocity refer to:
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The link AB is connected to a collar that moves on a vertical guide bar. The link is joined to the collar through a pin joint at A. dot y = 4.1 m/s doubledot y = 6.8 m/s^2 theta = 25.1 degrees
dot theta = 1 rad/s doubledot theta = -1.1 rad/s^2 and L = 0.68 m. Determine the horizontal component of a_B (positive is to the right). Specify your answer in m/s^2 to 3 decimal places.
The horizontal component of a_B is moving right with an acceleration with an angle θ at 8.2014 m/s².
Y.=4.1
y..=6.8
Angle θ=25.1
θ.=1rad/s²
θ..=-1.1rad/s²
L=0.68 m
Accelaration at b
ab=a=(α+rn)-ω².rb/a
rb/a=rb-ra
rb/a=0.416i+0.277j
aB=-2.0128i+8.2014j
a(b)=8.2014 m/s²
It measures how quickly velocity changes over time. Acceleration formula. Change in Velocity/Time Taken = Acceleration. (Final Velocity - Initial Velocity)/Time Taken is the formula for acceleration. The second object always applies an equal and opposing force to the first whenever one object applies a force to another. According to his third law, there is an equal and opposite reaction to every force (action) in nature.
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technician a says that synthetic oils can be used to extend oil change intervals because they do not become contaminated as quickly with soot and dirt as conventional oil. technician b says that synthetic oils can be used longer because they do not oxidize as quickly as conventional oil. who is correct?
Technician b is correct he syas that synthetic oils have a longer shelf life than traditional oils because they do not oxidize as quickly.
Deposits develop during the engine's motor oil circulation. Over time, conventional oils produce sludge from these deposits, decreasing the performance and life of your engine. Full synthetic oils, in contrast, have fewer impurities and don't form deposits or sludge. Conventional motor oil typically lasts five years when stored in unopened containers. Synthetic and semi-synthetic motor oils have a lifespan of seven to eight years. Given that their chemical makeup does not deteriorate over time, synthetic oils can easily provide a service life that is two times as long. Regular olive oil can be stored for up to three years without going bad. The incredible health benefits of coconut oil include everything from clear skin to lowering blood sugar. Long-term preservation of olive oil's properties is possible.
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19) mr. smith has allowed mrs. jones to run a sewer line through mr. smith's backyard so that mrs. jones has access to the city sewer system. this is an example of a(n):
Mr. smith has allowed mrs. jones to run a sewer line through mr. smith's backyard so that mrs. jones has access to the city sewer system. this is an example of Easement.
The most typical easements are affirmative ones. They permit exclusive usage of privately owned property. Positive easements are less lenient. They restrict the usage of land. a method or act of alleviating or relieving (as from discomfort): a stake in real property that authorizes the owner to a particular, constrained use or enjoyment. also: a plot of land that is the subject of an easement. In general, there are three different types of non-express easements that are created by legislation. Prescriptive easements, implied easements, and easements by estoppel are the first, second, and third types of easements, respectively. The dominant and servient lands must be registered with an official easement. Legal easements automatically transfer with the transfer of the dominant tenement or a portion of it.
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In CSMA/CD+ACK, when a wireless NIC wishes to transmit, it listens for traffic. If there is traffic, it waits. When the traffic stops, it may transmit immediately.
A) always true
B) sometimes true
C) always false
It is always true. A wireless NIC in CSMA/CD+ACK listens for traffic before transmitting when it wants to. It waits if there is traffic. It might transmit right away if the traffic stops.
What does a wireless NIC do?A dedicated, permanent connection to a network is provided by a NIC for a computer. It puts into practise the physical layer hardware required for interacting with a data link layer standard, like Ethernet or Wi-Fi. Each card serves as a device and has the ability to prepare, transmit, and manage data flow on the network.Many more recent mobile computers include a wireless network port incorporated into the motherboard due to the low cost and widespread adoption of the Wi-Fi standard.The phrase is typically used to describe IEEE 802.11 adapters, although it can also refer to NICs that use protocols other than 802.11, like those that support Bluetooth connections.To learn more about NIC refer:
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describe two barriers to using the theory in practice and at least one method for overcoming each barrier (support methods with sources)
Non-standard practices in clinical settings, a lack of confidence in clinical competence, a perceived lack of professional support, inadequacies in the teaching and learning process, and differences between how things are done in the real world and in simulations are just a few of the issues that can arise.
What is barriers?
The perceived obstacles to the adoption of evidence-based practice were a lack of understanding and ability to use study findings as evidence, poor time management, a lack of desire, a lack of resources, and inadequate training.
The main barriers fell into five categories: deviations from accepted practices in clinical settings, lack of confidence in clinical competence, perceptions of a lack of professional support, deficiencies in the teaching and learning process, and differences between behavior in the virtual world and in actual clinical settings.
There are essentially three different types of barriers: external barriers, organizational barriers, and personal barriers. Semantic barriers and psychological barriers make up the two categories of external barriers.
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design a rc low pass filter with cut-off frequency of 1khz. find one feasible combination of the r, c values of the circuit. what is the voltage gain of the filter circuit at 10khz frequency?
The voltage gain of the filter circuit of frequency is 10khz
What is voltage gain ?It is typically used in electronics to describe the amplification of a signal. While current gain is the ratio of output current to input current, voltage gain is the ratio of output voltage to input voltage.
voltage gain and current gain Pac dI iB = Ai The ratio of the transistor's input current to output current is known as current gain, or AI. A; = Bac = dic - ic for the CE amplifier in the forward active zone. The ratio of the transistor's input to output voltage is known as voltage gain (Ay).
Given ,
frequency = 1
filter circuit = 10
voltage gain = 10/1
= 10khz
Therefore the voltage gain is 10 khz
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A uniform rod BC of mass 4 kg is connected to a collar A by a 250-mm cord AB. Neglecting the mass of the collar and cord, determine (a) the smallest constant acceleration aA for which the cord and the rod lie in a straight line, (b) the corresponding tension in the cord. 250 mm 400 mm 350 mm
(a) The smallest constant acceleration aA for which the cord and the rod lie in a straight line is, a[tex]_A[/tex] = 4.09 m/sec².
(b) The corresponding tension in the cord is, T = 42.5 N.
What is tension?The force transmitted through a rope, string, or wire when pulled by forces acting from opposite sides is referred to as tension. The tension force is applied along the entire length of the wire and exerts an equal amount of force on the bodies at each end.
Every physical object that comes into contact with another one applies some sort of force. Depending on the type of object, these contact forces have different names. You can refer to a force as tension if a rope, cable, or chain is one of the objects it is pulling on.
Ropes and cables are useful for exerting forces because they effectively transfer a force over a limited distance (e.g. the rope length). Because ropes cannot effectively push, tension must be considered the pulling force.
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The rule of 10 states that a measuring instrument should
A. Have one tenth the resolution of the tolerance.
B. Be 10 times more accurate than the tolerance you are trying to hold.
C. Be 10 times more accurate than your reference standard.
D. Be graduated in tenths.
The rule of 10 states that a measuring instrument should have one tenth the resolution of the tolerance. Hence option A is correct.
What is resolution?Resolution is defined as a term used to describe how clear and sharp an image or picture is. Resolution describes how many pixels are shown for an image per inch.
According to the Rule of Ten, the measuring device's discrimination should divide the tolerance of the characteristic under test into ten parts. In other words, the measuring device or gage needs to be at least ten times more accurate than the characteristic being assessed.
Thus, the rule of 10 states that a measuring instrument should have one tenth the resolution of the tolerance. Hence option A is correct.
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historically, the average grade in chem 1015 is a b-/c . in order for an average student to earn an average grade, the average student would be expected to spend an average of 3 hour(s) a week on the course.
The biggest concern with using students in research is if your relationship with them will result in direct or indirect pressure on them to take part in the study.
The research found that during their first semester, students prioritized socializing and work duties over academics and spent less time on them. In general, students expected to devote more time to their studies in the second semester. According to the common rule of thumb for college studying, students should allocate two to three hours of study time for every hour spent in class. We discover that the typical monthly expenditure for college students is about $250 when we take into account that semesters are typically four months long and that students finish two semesters per year.
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which of the following is a long-term environmental consequence associated with the use of strip mining as a means to extract oil sands?
All these three are a long-term environmental consequence:
The large amounts of toxic wastewater generated present treatment and disposal challenges.The generation of steam necessary to liberate the bitumen required burning a lot of natural gas, generating carbon dioxide emissions.Permanent scarring of the landscape resulted from digging out the oil sands.Oil sands are a mixture of sand, water, and bitumen (oil that is too heavy or thick to flow on its own). Bitumen is so thick that it behaves similarly to cold molasses at room temperature. As a result, this resource is sometimes referred to as "tar sands," but that term is incorrect because bitumen and tar (asphalt) are distinct compounds. "Oil sands" correctly identifies the end product derived from bitumen: crude oil.
The oil sands of Canada are the world's largest crude oil deposit. The oil sands (or tar sands, as they are sometimes incorrectly referred to) are a mixture of sand, water, clay, and a type of oil known as bitumen. We can recover oil from the oil sands thanks to innovation and technology, ensuring energy security in the future.
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Technician A says low fluid level in the master cylinder reservoir indicates a leak in the system.
Technician B says for both drum and disc brakes, the friction material rotates with the wheel.
Who is right?
Select the correct option and click NEXT
O A only
B only
Both A and B
Neither A nor B
Technician A says the low fluid level in the master cylinder reservoir indicates a leak in the system. Technician B says for both drum and disc brakes, the friction material rotates with the wheel. Both A and B are correct.
What is a technician?A technician is a person who knows the technicality of machines and other things, They can repair these things.
These rubber rings prevent hydraulic fluid from escaping and keep it free of moisture and impurities. They also cause the piston to return to its off position, allowing the brake pads to disengage correctly when the brake pedal is released.
Therefore, the correct option is c, Both A and B.
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if the mixing ratio is 3.0 g/kg and the dry air temperature is 55f, what is the saturation mixing ratio?
A thermodynamic function of condition; the saturated air mixing ratio at the specified temperature and pressure.
How to Calculate a Mixing Ratio?The ratio of moist to dry airborne particles is referred to as the "mixing ratio" in the study of the atmosphere. Though it can also apply to other elements, it has a similar concept to humidity. It is possible to calculate a mixing ratio for gases other than water, such as argon or ozone. The earth's atmosphere is significantly impacted by even minor changes in the elemental mixing ratios. Depending on the data you already have, you can calculate the mixing ratio in a variety of ways. Using the saturation mixing ratio and humidity, the mixing ratio can always be calculated.The saturated mixing ratio and the relative humidity should be noted. Determines the amount of moisture in the air, humidity is a word you frequently hear on weather channels. At a given temperature, the maximum amount of water vapor that can be held in the air is known as the saturated mixing ratio. Let's say, for illustration purposes, that the saturated mixing ratio is 0.5 and the relative humidity is 0.8.The saturated mixing ratio multiplied by the mixing ratio. In this case, the solution is 0.8 x 0.5, which equals 0.04.In the previous step, multiply the response by 100. The response in our example is 0.04/100, or 0.004. Your mixing ratio is this response.By dividing the mixing ratio by the saturated mixing ratio and multiplying your result by 100, you can double-check your response.To Learn more About mixing ratio refer to:
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a pipe with closed ends has an outer diameter of and wall thickness of . it is subjected to an internal pressure of and a torque of . determine the maximum normal stress and the maximum shear stress. neglect the localized effects of the end closure.
The maximum normal stress is 900 MPa and the maximum shear stress is 1250 MPa neglecting the localized effects of the end closure.
Maximum normal stress = Internal Pressure x (Outer Diameter - Wall Thickness) / 2
= 1000 x (2 - 0.2) / 2
= 900 MPa
Maximum shear stress = Torque / (Outer Diameter x Wall Thickness)
= 500 / (2 x 0.2)
= 1250 MPa
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complete question.
a pipe with closed ends has an outer diameter of 2 and wall thickness of 0.2 m . it is subjected to an internal pressure of 1000 and a torque of 500 . determine the maximum normal stress and the maximum shear stress. neglect the localized effects of the end closure.
An office building requires a heat transfer rate of 20 kW to maintain the inside temperature at 21 °C when the outside temperature is 0 °C. A vapor-compression heat pump with R 134a as the working fluid is to be used to provide the necessary heating. The compressor operates adiabatically with an isentropic efficiency of 82%. Assume the refrigerant exits the evaporator as saturated vapor and exits the condenser as saturated liquid at the respective pressures. Find:Given ?T cond= ?T evap= 10 °C as shown in Figure below, what are the pressuresfor condenser and evaporator?What is the mass flow rate of the refrigerant (kg/s)What is the COP for actual cycleWhat is the COP for Carnot at T outside and T inside (0 and 21 °C respectively)
Mass flow rate (kg/s) of the refrigerant is 0.11 kg/s the actual cycle's COP What is Carnot's COP when T is outside and T is inside is 13
(a)
For the temperature difference of 10 C, the saturation pressure for R134a is found from
the refrigeration table.
P; = PA =800 kPa
P = P, = 200 kPa
Convert pressure in terms of bar.
1 bar
P; = PA =800 kPax-
100 kPa
= 0.8 bar
Hence, the pressure of refrigerant in the condenser is 0.8 bar
Convert pressure in terms of bar.
1 bar
R = P2 = 200 kPax
100 kPa
= 0.2 bar
Hence, the pressure of refrigerant in the evaporator is 0.2 bar
(b)
Calculate the compressor power.
Wcamp = m(hy - hz )
Here, the compressor work is Wcamp-
Substitute 0.11- form , 276.91- forh, , and 241.30- forh2 .
Wcomp =0.11kg/s x 276.91 -241.30
=3.92 kW
Hence, the compressor work is 3.92 kW.
Calculate the COP of the cycle.
cycle's COP=Q/W
cop=273/294-273
=13
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What is a branch interval? Select one: A. Secondary drain of the waste water drainage system within a building B. A vent branch through the roof of a building C. Total length of pipe measured along the centerline of the pipe D. Section of soil or waste stack corresponding to one story in height
Section of soil or waste stack corresponding to one story in height is a branch interval. Thus the correct option is option D.
What is branch interval?Branch interval is a term used to describe the vertical distance between horizontal branches that connect to a drainage stack, which must be at least 8 feet (2438 mm) in developed length. From the highest horizontal branch connection, measurements are taken down the stack.
There are frequently additional requirements for allowable loading in addition to the fundamental FU loading; in this case, a "branch interval" may refer to the number of stories permitted to drain to a specific stack diameter. The criteria for a 6in stack only permits a maximum of 4 branches or stories to be drained to it, so a 6in stack may handle x FU from 5 stories.
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Which Statements below are true?
One of the primary advantages of simulation models is that they enable managers to answer what-if questions about changes in systems without actually changing the physical systems themselves.
When we solve a nonlinear programming problem (NLP), it is very possible that Solver will obtain a suboptimal solution.
A correlation matrix must always have 1’s along its diagonal (because a variable is always perfectly correlated with itself) and the correlations between variables elsewhere.
The built-in functions in Excel, along with the RAND function, can be used to generate random numbers from many different types of probability distributions.
A common distribution for modeling product lifetimes is the binomial distribution.
The random nature of games of chance make them poor candidates for simulation.
One of the primary advantages of simulation models is that they enable managers to answer what-if questions about changes in systems without actually changing the physical systems themselves. (True)
What is simulation models?A physical model's performance in the real world is predicted by creating and examining a digital prototype of the physical model. Designers and engineers use simulation modeling to determine whether, under what circumstances, and in what ways a part could fail as well as what loads it can withstand.
Fluid flow and heat transfer pattern prediction can also be aided by simulation modeling. By using simulation software, it analyzes the approximative working conditions.
By using simulation modeling, engineers and designers can analyze designs for new or existing parts without repeatedly building physical prototypes. Users can investigate a variety of digital prototypes before producing the physical prototype.
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02-series deep-groove ball bearing is considered as an application with the inner ring rotating, with a design life of 25 kh at a speed of 350 rev/min. the radial load is 2.5 kn and an application factor of 1.2 is appropriate. the reliability goal is 0.90. find the catalog rating c10 with which to enter a bearing table and select an appropriate size bearing.
The reliability goal is 0.90 is reached with given perameter and chosen bearing is correct the C10 catalogue rating would be 14.
R=exp{-{525(3/25.50³-0.02/4.439}^1.483}
=exp{-{0.98/4.439}^1.483}
=exp(-0.106)
=0.919
So, the chosen bearing is correct.
A bearing is a part of a machine that reduces friction between moving parts and restricts relative movement to only that motion that is intended. A fixed axis rotation or free linear motion of the moving part are two examples of possible bearing designs. By controlling the normal force vectors acting on the moving parts, it may also be used to stop movement. To enable the desired motion, the majority of bearings reduce friction. Bearings can be divided into many different groups depending on the type of operation, the motions allowed, or the direction of the loads (forces) applied to the components.
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