average stress value in kpa with a 6 hz frequency and 5,371 kpa of pressure. 4,342
What does the term "sinusoidal function" mean?
A function that is based on the sine function, a periodic function that oscillates smoothly between high and low values, is referred to as a sinusoidal function. Since the cosine function is simply a horizontal shift of the sine function, sinusoidal functions can also be built on it. A function that describes some occurrence is a mathematical model. Since sinusoidal functions are periodic, they can be utilized as models for objects that display periodic behavior. In some applications of periodic phenomena, however, the concept of frequency is utilized in place of the period.
Explanation
y (+)= A0 + Bsin (wt)
A0= 5371 +3,313/2 =4,342
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There are many answers to this scenario. Please post yours and comment what you like about others and how you might improve them.
The Acme Company has two offices. They would like you to help them address their network. Like all companies, they want to account for growth, but want a simple, organized addressing scheme. They have been assigned the range of 201.11.10.224/29 for public access. Their VLAN needs are below for each site.
The 201.11.10.224/29 address has only 8 total addresses. That's not even going to cover the first subnet. This is a component of IPv4 and limited addresses. So, we can use Network Address Translation (NAT) on the router limiting the 201.11.10.0 addresses to the outside of network and use private addresses internally. What are the private address ranges? (Hint: They are in Module 11.3.1). Pick one and use that to address the scenario.
Document how you would address the network and communicate it to Acme leadership.
Walla Walla Office (HQ)
Management (10 devices)
Accounting (25 devices)
IT (30 devices)
Production (100 devices)
Seattle Office
Management (10 devices)
Accounting (25 devices)
IT (15 devices)
Production (50 devices)
Network address translation between Walla Walla and Seattle is the optimum network method for this.
What is Network Address Translation?Network address translation is a technique for translating one IP address space to another by altering network address information in packet IP headers while they are in transit through a traffic routing device.
The NAT (network address translation) is originally established to limit the number of public IP addresses used by major corporate businesses or companies, hence preserving both IP address conservation and protection.
There are several devices within the community that need to be protected from the outside world, thus the NAT permits private IP addresses to connect to the outside world.
As an example, designating a public handle to a set of HOST/gadgets inside an inside community/corporation.
Remember that a host or device in an inner network with a private IP address, say (192.168.1.11), wishes to interact with an internet server on the internet ( outside world ). Now, NAT will convert this non-public IP address into a public IP address (for example, 1.12.1.1) that is known to everyone.
So, the web server recognizes this precise public IP and returns its outcome to this deal with (1.12.1.1), after which it routes to the vacation spot, where the NAT converts it once more to the private IP deal with and sends the outcomes to the desired device in the non-public network.
As for a corporation's local network, there are numerous non-public IP with one public IP denoting all of them), so the result now, obtained via one of the devices in that network
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_____ can process many pieces of data at the same time and learn to recognize patterns.
Neural networks can process many pieces of data at the same time and learn to recognize patterns.
However, similar to the brain, such networks are capable of processing a variety of information concurrently, learning to spot patterns, and programming themselves to address similar issues on their own. Single instruction multiple data, or SIMD, is a type of parallel processing where a computer has two or more processors that all follow the same instruction set but handle distinct types of data. Large data sets that are based on the same predefined benchmarks are frequently analyzed using SIMD. Haptic interfaces, which are frequently used in gaming consoles, clothes, and sports training equipment, give tactile feedback by imparting vibrations or pressures to the user using actuators that are embedded in the device (for example, a cell phone).
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technician a says that cj-4 diesel engine lubricating oil is backward compatible with all previous diesel engine lube oil classifications. technician b says that the digit 4, in cj-4 means that the oil is suitable for 4-stroke cycle use. who is right?
Answer: The both the a and b technician are correct about the lubricating oil.
Explanation:
A lubricant, also known as lube or lubricant, is a substance that aids in reducing friction between surfaces in contact, thereby lowering the heat produced when the surfaces move. Additionally, it might be used for force transmission, the transportation of foreign objects, or the heating or cooling of surfaces. Lubricity is the quality that lowers friction.In addition to industrial applications, lubricants are used for many other purposes. Other uses include cooking (oils and fats in use in frying pans, in baking to prevent food sticking), bioapplications on humans (e.g. lubricants for artificial joints), ultrasound examination, medical examination, and sexual intercourse. It is mainly used to reduce friction and to contribute to a better and efficient functioning of a mechanism
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part b - designing and analyzing a series rl low-pass filter using the available 130 h inductor, what is the value of the resistor needed to make a low-pass filter with a cutoff frequency of 18 hz ? express your answer to three significant figures and include appropriate units. g
When built, an RL circuit functions as a low pass filter. The resistor is the shunt component in the circuit, and the inductor is the series component.
The inductors' reaction to a rise in operating frequency is what causes the circuit's filtering operation. The frequency at which the output (load) voltage is equal to 70.7% of the input (source) voltage is known as the cutoff frequency for a low-pass filter. An audio signal processor called a low-pass filter (LPF) takes out undesired frequencies from a signal that are above a preset cutoff frequency. It allows the low-end to flow through, ideally unchanged, while gradually filtering out (attenuating) the high-end over the cutoff frequency.
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How many physically different ways are there to realize V.W.X four 2-input AND gates? Justify your answer.
Answer: 16
Explanation:
a(n) is a support system that is completely concealed in the wall and supports the load of the fixture by means of a suitable face plate and base support firmly anchored to the floor.
Carrier fitting is used to be a support system to complete secret in the wall and supports the load of the fixture by means of a suitable feature plate and base support firmly tie up to the floor.
Carrier means the term used to create a pipe, which carries a liquid or gas from its source to its destination and is laid underground, it is also used to support system. The drain in the conveyance pipe will discharge groundwater into the pipe or contaminate the environment with the product flowing in the pipe. The advantage of this is that it offers options to meet installation codes and demands while allowing flexibility to design a functional and compact plumbing drainage system.
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a half-wave rectifier circuit with a 500-q load operates from a 120-v (rms) 60-hz household supply through a 12-to-l step-down transformer. it uses a silicon diode that can be modeled to have a 0.7-v drop for any current. what is the peak voltage of the rectified output? for what fraction of the cycle does the diode conduct? what is the average output voltage? what is the average current in the load?
A sinusoidal waveform's average voltage (VAV) is calculated by multiplying the peak voltage value by the constant 0.637,which is equal to two divided by pi.
Explain about the Average output voltage?A waveform's level that is determined by the requirement that the region enclosed by the curve above it is exactly equal to the region enclosed by the curve below it.
The amount of power averaged throughout time is referred to as average power. By averaging the instantaneous power's time throughout a single cycle, we may determine average power.
By multiplying the peak value by 0.637 or the RMS value by 0.9, average or mean voltage and current values may be derived that can be used to calculate the same amount of power consumption as for analogous DC values. When converting from AC to DC, the average or mean value is frequently utilized (rectification).
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air flows at 1.2 m/s along a flat surface when it encounters a jet of air issuing from the horizontal wall at point a, as in fio p8.16. the jet volume flow is 0.4 m/s per unit depth into the paper. if the jet is approximated as an inviscid line source, (a) locate the stagnation point s on the wall. (b) how far vertically will the jet flow extend into the stream?
In the upper atmosphere, jet streams are relatively narrow bands of powerful wind. Jet streams carry the winds as they go from west to east
Explain about the jet flow?Jet streams can travel at speeds of more than 275 mph (239 kts / 442 km/h) and range in height from four to eight miles. Both the Northern and Southern Hemispheres have jet streams.
At altitudes of roughly 8 to 15 kilometres, jet streams move across the tropopause, the region between the troposphere and the stratosphere (5 to 9 miles). When cold air and hot air collide, strong air currents are created that, when viewed on a jet stream map, often resemble wavy, striated rivers.
The mid to upper troposphere, the part of the Earth's atmosphere where we live and breathe, is where jet streams are found, about five to nine miles above the planet's surface.
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a cylindrical rod 380 mm long and having a diameter of 10.0 mm is to be subjected to a tensile load. if the rod is to experience neither plastic deformation nor an elongation of more than 0.9 mm when the applied load is 24,500 n, which of the four metals or alloys listed below are possible candidates? justify your choice(s). (2 points)
Answer:
Steel
Explanation:
Aluminium and copper alloys are not viable options because their permissible strain is less than the rod's estimated strain.
What is Strain?When an object is stressed, the amount of deformation or lengthening is measured as strain. Strain is typically stated as a ratio or percentage of the original length, area, or volume of the object. In other terms, strain is the amount of deformation in relation to an object's initial size or shape.
Calculating the stress and strain that the cylindrical rod would encounter under the specified conditions and comparing it to the permitted stress and strain values for each material will help us choose which of the four metals or alloys listed below are likely choices.
Let's begin by determining the rod's cross-sectional area:
Area = πr^2 = π(5 mm)^2 = 78.54 mm^2
The stress can then be calculated by:
[tex]Stress = Force / Area = 24,500 N / 78.54 mm^2 = 312.5 MPa[/tex]
We must apply the following formula to determine the strain:
Elongation / Initial Length = Strain
Given that the elongation shouldn't be greater than 0.9 mm:
Strain = 0.9mm/380mm =0.00237
Now that we have the stress and strain values and the permissible values for each material, we can compare them:
Allowable strain in aluminium alloy is 0.003 and allowable stress is 275 MPa.Steel alloy: 450 MPa of stress and 0.002 of strain are permitted.Copper alloy: 205 MPa of stress and 0.0035 of strain are permitted.Allowable stress for titanium alloy is 880 MPa, while allowable strain is 0.002.Therefore, due to their permissible stress and strain being more than or equal to that calculated for the cylindrical rod under the specified conditions, both the steel alloy and titanium alloy are potential options based on the comparison made above.
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An example of an external irreversibility associated with the Rankine cycle is
a. expansion of the working fluid through the turbine.
b. frictional effects resulting in pressure drops.
c. combustion of fuel.
d. irreversibilities in the pump.
An example of an external irreversibility associated with the Rankine cycle is combustion of fuel. Option C is correct.
What is the Rankine cycle?The Rankine cycle is defined as a modified thermodynamic cycle that describes how certain heat engines, such as steam turbines or reciprocating steam engines, extract mechanical work from a fluid as it passes between a heat source and a heat sink.
The Rankine cycle, also known as the Rankine Vapor Cycle, is a process that is widely used in power plants such as coal-fired power plants and nuclear reactors. The best example of an external irreversibility associated with the Rankine cycle is combustion of fuel.
Therefore, option C is correct.
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Salt in crude oil must be removed before the oil undergoes processing in a refinery. The crude oil is fed to a washing unit where freshwater fed to the unit mixes with the oil and dissolves a portion of the salt contained in the oil. The oil (containing some salt but no water), being less dense than the water, can be removed at the top of the washer. If the “spent” wash water contains 15% salt and the crude oil contains 5% salt, determine the concentration of salt in the “washed” oil product if the ratio of crud oil (with salt) to water used is 4:1.
Answer:
What is the question?
Explanation:
The two switches in the circuit seen in Fig. P7.6 are synchronized. The switches have been closed for a long time before opening at t = 0. a) How many microseconds after the switches are open is the energy dissipated in the 4 Ohm resistor 10% of the initial energy stored in the 6 H inductor? b) At the time calculated in (a), what percentage of the total energy stored in the inductor has been dissipated?
0.3 A is the calculated current. Because the sum of the currents entering and leaving the junction is equal, Kirchhoff's first law is based on the conservation of charge.
The algebraic sum of potential drops in a closed circuit must equal zero, according to Kirchhoff's second law.
The capacitors will begin charging through resistor 2 as soon as switch S is closed, and there won't be any current flowing through resistors 8 and 4.
As a result, I1=2/6
=3A,
I2=0,
and I3=0.
The charging of the capacitors will cease a long time after switch S is closed, but current will still flow through resistors 8 and 4.
Applying Kirchhoff's law, loops 1 and 2 are equal to (3/2)0.6
=0.9A and loop 3 is equal to
(0.90.6=0.3A).
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A resistor, an inductor, and a capacitor are connected in series to an ac source. What is the phase angle between the voltages of the inductor and capacitor in this rlc circuit?.
The phase angle is 180°.
A resistor, inductor, and capacitor are connected in series to an AC source.
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discuss why pressure tests of pressurized tanks such as steam boilers, pipes and tanks including gases such as nitrogen, air, oxygen, etc. with high pressure are carried out hydrostatically by using liquids such as water and hydraulic oil.
The reason that pressure tests of pressurized tanks such as steam boilers, pipes and tanks including gases such as nitrogen, air, oxygen, etc. with high pressure are carried out hydrostatically by using liquids such as water and hydraulic oil is because some of them are very volatile such as oxygen and can explode and as such the use of hydrostatic solvent can reduce its temperature.
Why do you use nitrogen for pressure testing?The use of pressure tests is to ensure the integrity of equipment including pressure vessels, pipes, plumbing lines, gas cylinders, boilers, and fuel tanks, pressure tests are a non-destructive option. The piping codes demand that it be verified that a piping system can support its rated pressure and is leak-free.
Nitrogen is free from many of the issues that come with utilizing air or water for pressure testing because it is inert, odorless, and has a low moisture content. Additionally, thanks to portable nitrogen generators, nitrogen is perfect for testing in a range of places.
Tanks and pipes are subjected to hydrostatic pressure testing to check for leaks. A hydrostatic test is carried out by pressurizing the vessel or piping under test, filling it, and then checking for changes in the pressurization level.
Note that there is the district cooling or district heating systems, by performing a pressure test. In addition to ensuring proper operation, this kind of examination will enable us to identify any leaks in a specific pipe so that repairs may be completed.
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tech a says that duo-servo brake shoes are only anchored on the top. tech b says that duo-servo brake shoe systems typically adjust automatically during normal brake applications in a forward direction. who is correct?
Tech A is correct. Duo-servo Brakes with the Bendix design are simple to recognize. At the top of the backing plate, they feature a single fixed anchor pin, and below the anchor is a dual-piston wheel cylinder.
Two brake shoes, referred to as the primary shoe and secondary shoe, are connected by an adjuster in the duo servo type's mechanism. Strong pressure from the primary shoe's servo effect (self-boosting effect) is transferred to the linked secondary shoe, creating a significant amount of braking force. The disadvantage of a dual servo is that it will use 80% of the braking force in reverse as opposed to a single servo's 20%, which will make it simpler to reverse your trailer.
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13. The type of building that can be built in an area would be covered in
O A. building permits.
O B. deed restrictions.
O C. sales contracts.
O D. zoning restrictions.
ase 8. while discussing the causes of a rich air-fuel ratio: technician a says that a rich air-fuel ratio may be caused by low fuel pump pressure. technician b says that a rich air-fuel ratio may be caused by a defective coolant temperature sensor. who is correct?
Answer:
technician
Explanation:
a tidal power plant has a pool area of 26 km2 . the tide has a range of 8.5 m. how much energy (kwh) is generated in one cycle of filling and emptying the tidal impoundment, if the turbinegenerator efficiency is 75%?
3.676 x [tex]10^{6}[/tex] kWh of energy generated in one cycle of filling and emptying the tidal impoundment.
Energy generated in one filling (or emptying) process is
Energy = [tex]\frac{1}{2}[/tex] ρgA([tex]R^{2}[/tex] – [tex]r^{2}[/tex]), Joules
Where,
ρ = density of sea water = 1025 kg/[tex]m^{3}[/tex]
g = acceleration due to gravity = 9.81 m/[tex]s^{2}[/tex]
A = basin area = 26 km2 = 26 x [tex]10^{6}[/tex] [tex]m^{2}[/tex]
R = minimum head for turbine operation = 3m
E = 1/2 x 1025 x 9.81 x 26 x 106 x 135 J
= 1,76,46,963.75 x [tex]10^{6}[/tex] J
= (1,76,46,963.75 x [tex]10^{6}[/tex]) / (1000 x 3600) kWh
= 4.901 x [tex]10^{6}[/tex] kWh
But the theoretically available tidal energy in one filling process has to be multiplied by 73% or 0.73 to get actual energy generated by the turbine generator.
Therefore, actual energy generated, [tex]E_{actual}[/tex]is given by
[tex]E_{actual}[/tex] = 75% of [tex]E_{theoretical}[/tex]
= 0.75 x 4.901 x [tex]10^{6}[/tex]
= 3.676 x [tex]10^{6}[/tex] kWh
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which three gauges or indicators are the most important to be aware of? coolant temperature gauge, oil pressure gauge, and high beam indicator fuel gauge, oil pressure gauge, battery voltage gauge coolant temperature gauge, oil pressure gauge, and battery voltage gauge fuel gauge, coolant temperature gauge, and battery voltage gauge
Your three gauges will be: Oil pressure, battery voltage, and a coolant temperature indicator are all included.
What gauges to install in car?Your three gauges will be: Boost Gauge. Oil Pressure Gauge A wideband gauge for the air/fuel ratio.The oil pressure gauge is the most crucial device in the car. A mechanical gauge is the instrument of choice for the majority of racecars. There are many different mechanical gauges available, but one thing to think about is the gauge's overall range.The speedometer and fuel gauge are the two most used gauges. This is because (clearly, we hope) staying aware of your speed is essential to maintaining both your safety and compliance with the law. The speedometer used to be connected to a cable that went into the gearbox box.To Learn more About three gauges Refer To:
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a seesaw weighing 3 lb/ft of length is occupied by two children, each weighing 90 lb (see gure). the center of gravity of each child is 8 ft from the fulcrum. the board is 19 ft long, 8 in. wide, and 1.5 in. thick. what is the maximum bending stress in the board
The maximum bending stress in the board is 3420Psi.
B = 8 inch h = 1.5 inch
q = 3 lb/ft p= 90 lb d = 8 ft l = 9.5
[tex]M_{max} =[/tex] pd+[tex]\frac{q L^{2} }{2}[/tex]
= 720lb ft+135.4lb ft
= 855.4lb ft
= 10264 lb inch
S = [tex]\frac{bt^{2} }{6}[/tex]= 3.0[tex]in^{3}[/tex]
σmax = [tex]\frac{M}{S}[/tex]
= [tex]\frac{10264 lb inch }{ 3.0inch^{3} }[/tex]
= 3420Psi
What is bending stress?Bending stress is the normal stress that an object can withstand when an external load is applied to it at any cross section. Bending stress is also defined as the ratio of bending moment to section modulus.
If a transverse load is applied to a beam of arbitrary cross-section, the beam bends. In addition to bending, there can be other effects such as bending and twisting , and studying a problem that includes all the combined effects of bending, twisting, and buckling can be difficult. Therefore, we are only interested in studying bending effects.
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a steam power plant operating on the simple ideal rankine cycle is considered. the heat input into the cycle is 2728 kj/kg, and the heat output is 2018 kj/kg. determine the thermal efficiency of this cycle.
The average temperature at which heat is fed to the cycle is raised, increasing the Rankine cycle's thermal efficiency. lowering the typical temperature at which the cycle rejects heat.
Power plants that employ coal or nuclear energy frequently use the Rankine cycle, also known as the Rankine Vapor Cycle. A fuel is used in this mechanism to generate heat in a boiler, turning water into steam that expands via a turbine to provide useful work. The Rankine cycle's efficiency is lower than that of a Carnot cycle operating between the same maximum and minimum temperatures because the mean temperature at which heat is provided is lower than the maximum temperature,
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A alloy bar 1m long and 200m in cross-section is subjected to compression force 20KN if the modulus of elasticity of the axial is 100Gpa. Find the decrease in length of the bar
A alloy bar 1m long and 200m in cross-section is subjected to compression force 20KN if the modulus of elasticity of the axial is 100Gpa. The decrease in the length of the bar is 1 X 10^-12m.
Define elasticity.
Elasticity, in physics and materials science, is the capacity of a body to withstand a force that distorts it and to recover its original size and shape when the force is withdrawn.
Elasticity is characterized as a feature of materials that allows them to resume their original shape after being deformed by stress that has been removed. The pascal is the SI unit for elasticity and the elastic modulus (Pa).
Solution Explained:
Given,
Length = 1m
Area of Cross-Section (A) = 200m^2
Tensile force (P) = 20kN
Modulus of elasticity (E) = 100Gpa = 1 X 10^11 N/m^2
Using the formula,
Δl = P X length / A X E
= 20 X 1 / 200 X 1 X 10^11
After calculation, we get
Δl = 1 X 10^-12m
Therefore, the decrease in length is 1 X 10^-12m.
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A specimen of a 4340 steel alloy having a plane strain fracture toughness of 45 MPa√m (41 ksi√????????) is exposed to a stress of 1000 MPa (145,000 psi). Will this specimen experience fracture if it is known that the largest surface crack is 0. 75 mm (0. 03 in. ) long? Why or why not? Assume that the parameter Y has a value of 1. 0. (
The value was calculated to be 927 MPa. There will be fracture in the specimen. Fracture is the medical term for a break, usually in a bone.
When a bone is broken and pierces the skin, the fracture is considered open or complex. Slips, trips, and sports injuries are common causes of fractures. Other concerns include osteoporosis, which weakens the bones, and low bone density. A shattered bone is known as a fracture, also referred to as a crack or break. A bone may fracture in a number of ways, either completely or partially (crosswise, lengthwise, in multiple pieces).
Calculate the critical stress for brittle fracture.
Given that the critical stress is 927 MPa and that fracture toughness is equal to (fracture toughness / (y * surface crack)) = 45 / (1) = 927 MPa, the following is true: The fracture will occur.
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If C1= 20 micro farad and CW= 10 micro farad are connected in series in a simple electric circuit,then find the total capacitance
The total capacitance of the given electric circuit is 30 microfarad.
Define capacitance.
The ability of a physical thing or equipment to store electric charge is known as capacitance. The capacitance is quantified by the ratio of those values, which represents the change in charge in response to a variation in electric potential.
When an earthed conductor is moved close to a conductor, its capacitance increases, which is how capacitors operate. The capacitor, therefore, contains two parallel plates that are spaced apart by a certain amount of gap and oriented in opposing directions. The formula C=Q/V is used to determine a capacitor's capacitance based on its charge, Q, and its voltage, V.
Solution Explained:
Given, C1 = 20microfarad and CW = 10 microfarad
Since they are in series,
Total capacitance = C1 + CW = 20 + 10 = 30microfarad
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What polymer is a package made of?
Answer:
polyethylene
Explanation:
The elasticity of polyethylene makes it an ideal material for food packaging. Polyethylene is used extensively in the automotive industry. Polyethylene is often used for manufacturing stock poly bags, zip lock bags, bottles, food containers, food crates, stretch film, tape, pallets and plastic sheeting.
Polythene is commonly used as a packaging material. The most common polyethylene types used in food packaging are high-density polyethylene (HDPE), low-density polyethylene (LDPE), and linear low-density polyethylene (LLDPE).
Explanation:One of the most popular materials used in the food industry for packaging is petroleum plastics (synthetic polymers). Such polymers include polyethylene terephthalate (PET), low and high-density polyethylene (LDPE and HDPE respectively), polypropylene (PP), polyvinyl chloride (PVC), and polystyrene (PS). Paper, paperboard, and cardboard cartons are frequently used as packaging for products in stores as well as used in shipping. Corrugated cardboard, for example, has excellent structural stability for shipping, storing, and even marketing products.
3. When using the Cold Saw what is the correct Water to Coolant ratio?
a.
b.
10:1
20:1
c. 15:1
d. 25:1
When using the cold saw, the correct water-to-coolant ratio should be 20:1.
What is a cold saw?
A cold saw is a sawing machine that uses a circular saw blade to cut metal.
What happens if coolant to water ratio is too high?
Having too much water will not cool the engineHaving too much antifreeze could cause your water pump to fail.What happens if you don't add water to the coolant?
Water has minerals that can deform deposits inside the radiator and the cooling system passages of your engine. And over a long period of time, they can lead to overheating.Therefore, in a cold saw the water-to-coolant ratio should always be 20:1.
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a w18x65 of a992 steel is laying on its side and is being bent about its weak or y-axis. assuming the member is only supported at its ends and is simply supported, what is the maximum span length it can have before it reaches its design moment capacity based on it plastic moment due to its self-weight only? (hint: do not apply a load factor since the self-weight is well-known.)
A framework for a shared understanding of the acceptable standards when contracting for structural steel is provided by the AISC Code of Standard Practice.
What is meant by AISC?The AISC created the American Institute of Steel Construction (AISC), a company-level accreditation for the manufacture and construction of structural steel. Companies that construct steel structures, such as buildings, bridges, and the parts of bridges and highways, are eligible for this certification.IS: 2062 - General Steel Purpose Specifications.AISC Certification looks at a company's QMS as a whole, going much beyond the minimal standards for product inspection. AISC-Certified businesses must have a comprehensive QMS that addresses every aspect of fabrication or erection, from quality objectives to employee development to product delivery.All errata to earlier printings have been incorporated into the most recent version of ANSI/AISC 360-16, which was published in March 2021 (the following errata lists also include updates to other sections of the 15th Edition Steel Construction Manual).To Learn more About AISC Code Refer To:
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fairings are attached to the front and back of a cylindrical body to make it look more streamlined. what is the effect of this modification on the (a) friction drag, (b) pressure drag, and (c) total drag? assume the reynolds number is high enough so that the flow is turbulent for both cases.
The correct answer is (a) friction drag . therefore the correct option is the option (b).
Friction drag, also referred to as skin friction drag, is resistance felt by an object traveling through a fluid as it comes into contact with its surface. It grows with the square of the velocity and is exactly proportional to the area of the surface in contact with the fluid. For connected flows (where there is no separation), frictional drag is significant and is correlated with the exposed surface area. For separated flows, pressure drag is crucial, because it is correlated with the body's cross-sectional area. The air blowing directly above the Earth experiences frictional drag.
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an engineer has performed an experiment to study the effect of four factors on the surface roughness of a machined part. the factors are: a
the correct answer is the option (b).
Surface roughness is the measurement of the relative smoothness of a surface’s profile, calculated via the microscopic deviations in a surface's true form. The larger the deviation from its true form, the rougher the surface, whilst the smaller the deviation, the smoother the surface.A rougher finish cannot be achieved through machining. A secondary process like bead-blasting or tumbling is required. There is no one way to achieve a particular surface roughness as both the machining process and secondary finishing influence the surface roughness. Get in touch with a member of our team to discuss the optimal procedure for finishing your parts.
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the small-signal model is said to be valid for voltage variations of about 5 mv. to what percentage current change does this correspond? (consider both positive and negative signals.) what is the maximum allowable voltage signal (positive or negative
The signal is "high" when it is over the high threshold. Undefined intermediate levels lead to extremely implementation-specific circuit behavior.
It is customary to allow for some tolerance in the voltage levels utilized; for instance, logic 0 might be represented by 0 to 2 volts, and logic 1 by 3 to 5 volts. An example of a widely used signal standard is 0-10 volts, which states that a signal of 0 volts represents 0% of the measurement, a signal of 10 volts represents 100% of the measurement, a signal of 5 volts represents 50% of the measurement, and so on. For a "low" logic state and a "high" logic state, respectively, acceptable input signal voltages range from 0 volts to 0.8 volts and 2 volts to 5 volts. The supply voltage will, for the most part, determine the operating range.
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