Due to the absence of any vehicles on the road, the flow is zero when the density is zero. As the density rises, the flow rises as well until it reaches certain maximum flow parameters.
Flow density: what is it?Traffic flow is defined as the volume of cars passing a particular location in a specified amount of time. Vehicles per hour are used to measure it. Flow of traffic It is the quantity of automobiles utilizing each unit length of the roadway at any given moment. Vehicles per kilometer are used to measure it.Due to the absence of any vehicles on the road, the flow is zero when the density is zero. As the density rises, the flow rises as well until it reaches certain maximum flow parameters.Due to the absence of any vehicles on the road, the flow is zero when the density is zero. As the density rises, the flow rises as well until it reaches certain maximum flow parameters.To learn more about Maximum flow parameters refer to:
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When responding to a railroad incident, most railroad companies advise that all vehicles be kept at least _____ from the tracks.
Answer:
Twenty feet from the tracks
Explanation:
for fixed maximum and minimum temperatures, what is the effect of the pressure ratio on (a) the thermal efficiency and (b) the net work output of a simple ideal brayton cycle?
The thermal efficiency is impacted by the pressure ratio at given maximum and minimum temperatures.
What is thermal efficiency?The proportion of heat energy that is converted into work is known as a heat engine's thermal efficiency. Even the most efficient heat engines have low efficiency; typically below 50% and frequently much lower. As a result, heat engines' energy loss to the environment represents a significant waste of energy resources.
The carbon footprint of a building is significantly decreased by a thermally efficient building envelope. Such initiatives boost occupant comfort and productivity levels while reducing energy consumption and costs.
The thermal efficiency of a system is the amount of work produced for a given amount of heat. Engines that use heat produce work. The thermal efficiency is a measure of the percentage of heat that is converted into useful work.
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what should the attack team do if they open the door to a structure and observe a low neutral plane and turbulent smoke?
Apply water to the hot gas layer, but stay outside the structure.
What is positive pressure ventilation fire fighting?A coordinated fire strike called a Positive Pressure Attack (PPA) makes use of fans to help put out the flames.After a fire has been put out, positive pressure ventilation (PPV) uses fans to exhaust the combustion byproducts.For interior crews, fighting fire is significantly less important than fighting smoke in a successful and safe fire attack.Positive Pressure Attack (PPA) benefits victims who may be in regions where they can survive upon our arrival as well as firemen who are not in obstructed, combustible, or carcinogenic settings.The exhaust is most important for the effectiveness of PPA even though many different factors (fan size, setback distance, angle, intake, exhaust, etc.) can alter the pressures created by a fan.To learn more about Positive Pressure Attack refer,
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The attack team need to Apply water to the hot gas layer, but stay outside the structure if they saw a low neutral plane and turbulent smoke
What is the job of firefighter?The goal of the demanding profession of firefighting is to save and rescue people, animals, and property from fires and other dangerous situations. Firefighters manage dangerous situations as skilled experts while preserving lives.They also respond to and help people in situations involving accidents and natural disasters like landslides, landslides, earthquakes, storms, and floods. Three ingredients are required for a fire to burn: fuel, oxygen, and heat. The flaming triangle is a common name for this. The goal of combating a fire is to rob it of at least one of those components. The most common method for doing this is dousing the fire with water, but some fires also call for the use of foam or dry agents.To learn more about firefighter refer :
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Suppose a pv farm requires 2,000 panels to generate power at 40% efficiency. If a new panel were invented that was 50% efficient, how many panels would be required?.
The number of panels that will be required is 1600 panels.
How to calculate the number of panels?From the information, we have:
2000 - 40% efficient panels
Now let each panel generate power = P
Hence, with 2000 panel we have 2000P.
Now, these are 40% efficient so
40% of incident power = 2000P
Incident power = 5000P
Power used by 1 panel = 5000P/2000 = 2.5P
Now we have 50% efficient panel and we have to generate 2000P,
Now 50 % of incident radiation = 2000P
Incident radiation = 4000P
Now no. of panel needed will be:
= 4000P/2.5P
= 1600
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When using a digital multimeter, setting the meter to a higher range than is noramally require will
When using a digital multimeter, set the meter to a higher range than is normally required will the range selector to be set to AC for of current and the maximum range selected for the current measurement.
What is a Digital Multimeter?Digital multimeters are measuring tools capable of measuring voltage, current, and resistance. Measured data are shown on a digital display, allowing even inexperienced users to view them quickly and immediately.
Multimeters are classified into two categories: analog and digital. The key distinction between the two is the display; an analog multimeter displays the value with a needle, whilst a digital multimeter displays the data as numbers on a screen.
Analog multimeters are less accurate than digital multimeters. Standard analog multimeters typically have a 3% accuracy. Digital multimeters have an accuracy of 0.5%. Because of erroneous pointer readings, analog multimeters are also less accurate.
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the nameplate on a single-phase motor indicates 115 volts. this motor is suitable for use on what ranges of voltage?
115 volts are indicated on the single-phase motor's nameplate. voltage ranges between 110 and 120 are suitable for usage with this electric motor.
Electric motors are electrical devices that convert electrical energy into mechanical energy. The majority of electric motors function by producing torque that is applied to the motor shaft through the interaction of the motor's magnetic field and the electric current flowing through a wire winding. Although essentially equivalent to electric motors, electric generators convert mechanical energy into electrical energy using a reversed power flow.
Electric motors can be powered by either direct current (DC) sources like batteries or rectifiers or alternating current (AC) sources like a power grid, inverters, or electrical generators.
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A grocery store is expressing security and reliability concerns regarding the on-site backup strategy currently being performed by locally attached disks. The main concerns are the physical security of the backup media and the durability of the data stored on these devices Which of the following is a cost-effective approach to address these concerns?
A. Enhance resiliency by adding a hardware RAID.
B. Move data to a tape library and store the tapes off site
C. Install a local network-attached storage.
D. Migrate to a cloud backup solution
Please also explain why not other options
The option that is a cost-effective approach to address these concerns is option D. Migrate to a cloud backup solution
What is backup to the cloud?A service known as cloud backup backs up and stores the information and programs on a company's servers on a different server. When a system fails, there is an outage, or a natural disaster strikes, businesses choose to back up to the cloud to keep their files and data accessible.
There are different kinds of cloud backup services: you can set up an on-premises backup to save data to the cloud, use a dedicated cloud backup provider, backup data directly in the public cloud, backup data from one cloud to another, or backup data from one cloud to another.
Therefore, The reason why it is not the others is that the cost of backing up using the other options will be more expensive and also needs a lot of space and as such, cloud service is the best.
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A hydraulic press was installed 10 years ago at a capital investment cost of $70,000. This press presently has a market value of $14,000. If kept the press as an economic life of 3 years, operating expenses of $14,000 and a market value of $10,000 at the of year three. The existing press is being depreciated by the straight-line method using a 15 year write of period with an estimated salvage value for depreciation purposes of $10,000. As an alternative, the currently owned press can be replaced with an improved challenger press which will cost $65,000, to install, have operating expenses of $9,000 per year and have a final market value of $10,000 at the end of its 20-year economic life. If the replacement is made, the challenger press will be depreciated with the straight-line method over a 20 year life with an estimated salvage value of $10,000 at EOY 20. It is thought that a hydraulic press will be needed indefinitely. If the after-tax MARR is 10% per year and the effective income tax rate is 40%, should the defender or the challenger be recommended (30 Points)
The expanse saved is $5000 and the net present value is $6946.
What is hydraulic press?Hydraulic press is defined as a press machine that produces compressive force with the help of a hydraulic cylinder. The Pascal's law, which states that when pressure is applied to a confined fluid, the pressure changes across the entire fluid, underlies the operation of a hydraulic press.
20 years make up the term.
Since the MARR is 10% after taxes, the discount rate already takes taxes into account.
The initial cost is $51,000 (installment cost of $65,000 minus $14,000 market value of the defender).
Salvage is worth $10,000.
The annual operational expense savings are 14,000 - 9,000, = $5,000.
Differences in depreciation are irrelevant because only cash flows are taken into account by net present value.
The net present value = 42,568 + 1,486 - 51,000 =-$6,946
The present value of the net is negative.
Thus, the expanse saved is $5000 and the net present value is $6946.
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the measure of how well a product meets its requirements or specifications is called a.quality of conformance. b.service quality. c.quality of design. d.the taguchi quality loss function.
Answer:
a.) quality of conformance
Explanation:
Service quality is an organization's ability to meet its customers' expectations when delivering its services.
Quality of design relates to how well a product or service meets a customer's ideal needs.
The Taguchi quality loss function is a graphical representation of the exponential growth in customer dissatisfaction based on the variance in the specification limits.
What’s the four-letter type of adapter that’s used with electrical devices that require power but do not contain internal components to derive the required voltage and power from mains power?.
The four-letter type of adapter are B, C, D and M that’s used with electrical devices that require power.
What is adapter ?A device that converts characteristics of one electrical system or device to those of another that is otherwise incompatible is known as an adapter or adaptor.
Some simply adapt the physical design of one connector to another, while others change the power or signal attributes.
A host controller connects a computer to a peripheral item, such as a network, storage, or human interface item. A host controller is sometimes known as a host bus adaptor because it may be thought of as bridging the protocols used on the buses between peripheral and computer and internally to the computer.
A peripheral device can be connected to a separate jack on a computer using an adapter. They are frequently used to link legacy devices to modern ports or modern devices to legacy ports on older systems. Such adapters may have active circuitry or be fully passive.
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Solve: cosine (x + pi) = one-half over the interval left-bracket startfraction pi over 2 endfraction, pi right-bracket. Startfraction pi over 2 endfraction startfraction 2 pi over 3 endfraction startfraction 3 pi over 4 endfraction startfraction 5 pi over 6 endfraction.
Answer:
2pi/3 - edge
Explanation:
trust
Answer:
2pi/3
Explanation:
technician a says that most hybrids require that they be plugged into an electrical outlet at night to provide the electrical power to help propel the vehicle. technician b says that the internal combustion engine in an hev will often stop running when the vehicle is stopped. which technician is correct?
All of the EVs and PHEVs that are now on the market are made to plug into a typical 120-volt outlet, such as one that is located in your house, garage, or carport.
Direct wheel drive is provided by both the internal combustion engine and the electric motor. Plug-in hybrid electric vehicles are more likely to have series hybrids, which only use the electric motor to drive the wheels. An internal combustion engine and one or more electric motors, which utilise energy stored in batteries, work together to power hybrid electric cars. The battery of a hybrid electric vehicle cannot be charged by plugging it in. Instead, the internal combustion engine and regenerative braking are used to charge the battery.
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a special stainless-steel cone sits on top of a cable television antenna. the cost of the stainless steel is per cm 3. the cone has a radius of 9 cm and a height of 10 cm. what is the cost of the stainless steel needed to make this solid steel cone? round to the nearest cent.
The correct answer is the cost of the antenna stainless steel is $8.00 per cubic centimeter.
Antennas are much more than simple devices connected to every radio. They're the transducers that convert the voltage from a transmitter into a radio signal. And they pick radio signals out of the air and convert them into a voltage for recovery in a receiver.plural antennae : one of a pair of slender, movable, segmented sensory organs on the head of insects, myriapods, and crustaceans see insect illustration. : a usually metallic device (such as a rod or wire) for radiating or receiving radio waves.
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if the rotor of a dc motor consists of just one conductor loop, the output torque will vary in magnitude from zero to a maximum and back to zero over every half turn of the rotor.
The true statements are:
Major part of a DC motor are station, commutator and brushes.
if the rotor of a dc motor consists of just one conductor loop, the output torque will vary in magnitude from zero to two maximum and back to zero every half turn of the rotor.
Using multiple loops in the rotor of a dc motor not only gives higher torque but also ensures a constant magnitude of the output torque.
In a series motor, rotor and station are connected in series.
In a shunt motor, a bypass circuit is provided to prevent overload.
What is DC Motor ?
Any of a group of rotating electric motors that use direct current (DC) electricity to create mechanical energy is referred to as a DC motor. The most prevalent kinds depend on the forces created by induced magnetic fields brought on by current flowing through the coil. For a portion of the motor's current to occasionally shift direction, almost all types of DC motors contain an internal mechanism that is either electromechanical or electronic.
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3. Why do plastic and composite fenders require different bolts?
Plastic and composite fenders require different bolts because fenders combine energy absorption and deflection qualities.
What are plastics?Plastics are defined as a class of substances, either artificial or natural, that can be molded while still soft and subsequently hardened to maintain the desired shape. The thickness grade for plastic sheeting most frequently used is 6 mil. This is 0.006 inch, or six thousandths of an inch.
Fasteners are regarded as tools that are used in a variety of applications to form a solid junction. While some fasteners are permanently linked, the majority allow joints to be broken apart or withdrawn without harming the pieces that were joined.
Thus, plastic and composite fenders require different bolts because fenders combine energy absorption and deflection qualities.
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5-9. A new six-speed automatic transmission
for automobiles offers an estimated 4% improvement
in fuel economy compared to traditional fourspeed
transmissions in front-wheel drive cars. If a
four-speed transmission car averages 30 miles per
gallon and gasoline costs $4.00 per gallon, how much
extra can a motorist pay for a fuel-efficient six-speed
transmission? Assume that the car will be driven for
120,000 miles over its lifetime of 10 years. The motorist
can earn 6% per year on investments. (5.3)
If a four-speed transmission car averages 30 miles per gallon and gasoline costs $4.00 per gallon, the maximum amount that should be paid for a fuel-efficient six-speed transmission is $453.
What is the explanation for the above results?We are given the following:
Total Fuel Cost when using traditional transmission = Miles Per Year / Miles Per Gallon x Per Gallon Cost
= Miles/year
= 120000 / 10 = 12,000 miles
Hence the Total Fuel Cost = 12000/30 x 4
= $1,600
With 6 speed , miles per gallon = 30 x (1+ 0.04) = 30* 1.04 = 31.20 MPG
Hence the reviewed Cost = 12000 / 31.20 * 4 = $1,538.50
This means that Yearly Savings in cost = 1,600 - 1538.50
= $61.50 per year
Hence, every year we save $61.50
Therefore, the maximum amount that will be paid extra is the present value of all the savings where n =10 and i = 6%
So, PVIFA (n=10 , i=6%) = 7.3601
So Present Value of Cash Flows = 61.50 x 7.3601 = 452.64615
[tex]\approx[/tex] $ 453
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quizzlet you are on a two-way street, stopped at an intersection. can you legally turn left on a red light into a one-way street?
Unless prohibited, you can legally turn left on a red light into a one-way street if traffic allows.
State some traffic rules?
Always use a seatbelt.Avoid distractions.Do not exceed the speed limit.Regularly service your car.Follow traffic signals.Maintain lane discipline.Be cautious in inclement weather.Maintain a safe distance.Slow down at road junctions, intersections, pedestrian crossings, and road corners, and wait until you are certain of a clear path ahead. If you are approaching the main road where traffic is not controlled, give way to vehicles passing on your right. Hand signals are required at times. These are some of the traffic rules.
Hence we can say that Unless prohibited, you can legally turn left on a red light into a one-way street if traffic allows.
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14. when the rotor of a three-phase induction motor is blocked, its rotor frequency will be: a. zero
when the rotor of a three-phase induction motor is blocked, its rotor frequency will be same as the supplied frequency.
What is induction motors?An induction motor, also known as an asynchronous motor, is an AC electric motor in which the magnetic field of the stator winding is used to electromagnetically induct the electric current into the rotor necessary to produce torque.Therefore, it is possible to construct an induction motor without electrical connections to the rotor.When a load needs to be controlled in speed, they are used.Induction motors with wound rotors or slip rings are frequently used in conveyors, elevators, cranes, plunger pumps, crushers, and compressors.To learn more about Induction motor refer,
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Select all that are true. Group of answer choices in a dc motor, induced or back emf results from magnetic force exerted by stator on the charges in the rotor. Back emf is the useful energy output as a result of the interaction between the rotor and the stator of a motor. A dc motor draws a current i. The internal resistance of the motor is r. If v is the voltage applied at the terminals of the motor, back emf epsilon is the difference of v and i r. A dc generator has the same major parts as a dc motor, i. E. Stator, rotor, commutator, and brushes. A dc generator converts mechanical energy into electrical energy; whereas a dc motor converts electrical energy into mechanical energy. The purpose of brushes in a dc motor or generator is to keep the commutator clean of any dirt or foreign objects.
The statements given in options A, C, D, and E are correct in the context of a DC motor.
A DC motor is referred to as an electronic machine that transforms electrical energy into mechanical energy. A DC motor operates using direct current. In asscoaictaion with a DC motor following statements are true:
In a DC motor, back or induced emf results from the magnetic force exerted by the stator on the charges in the rotor. A DC motor draws a current 'i'. The internal resistance of the motor is 'r'. If 'v' is the voltage applied at the terminals of the motor, then back emf epsilon is the difference between 'v' and 'i' 'r'. A DC generator has the same main parts as a DC motor, i.e. rotor, stator, commutator, and brushes. A DC motor converts electrical energy into mechanical energy; whereas a DC generator converts mechanical energy into electrical energy.However, the following statements are not correct in relation to a DC motor.
Back emf is the useful energy output as a result of the interaction between the rotor and the stator of a motor.The purpose of brushes in a dc motor or generator is to keep the commutator clean of any dirt or foreign objects.You can learn more about DC motor at
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describe in your own words the four strengthening mechanisms. explain how dislocations are involved in each of the strengthening techniques.
Grain size reduction, solid-solution strengthening, precipitation hardening, and work (or strain) hardening are the four strengthening mechanisms.
By creating stress fields in the material, dislocations communicate with one another. Dislocation motion can be slowed down by repulsive or attractive interactions between the stress fields of the dislocations. All four strengthening mechanisms—grain refinement, solid solution, precipitation strengthening, and work hardening—can be employed to produce materials with such extraordinary capabilities. The proportional contributions of strengthening mechanisms change depending on the composition of the alloy, the deformation temperature, and the heat treatment. Strain hardening, solid-solution strengthening, grain-boundary strengthening, precipitation strengthening, and dispersion strengthening are some of the main strengthening mechanisms in metals and alloys.
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what is true? question 5 options: a) vortex line has a variable strength b) vortex line has a constant strength c) vortex line has a variable strength
Option b is true. It is true that the vortex line has a constant strength. It is a vortex of constant strength that acts along the whole length of the line.
The line vortex, which describes a line's passage through three-dimensional space in the case of propeller technology, is a vortex of constant strength that acts along the whole length of the line. Helmholtz, a German mathematician, physicist, and physician, discovered several fundamental rules for the behavior of inviscid vortices with relation to vortex filaments. These rules have come to be known as Helmholtz's vortex theorems.
1. A vortex filament's strength remains constant throughout its length.
2. In a fluid, a vortex filament cannot come to an end. As a result, the vortex must reach the fluid's boundary, which may be at, or else the vortex filament must create a closed channel inside the fluid.
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what is the total material weight of a load consisting of 20 pieces of 4 foot x 10 foot steel sheets that are1/4 inch thick?
The correct answer is 8,160 lb Note: A steel sheet at 1/4 inch thick weighs 10.2 pounds/foot.
The recommended maximum angle for any sling leg to the vertical is 45°. It is necessary to presume that just two of the sling's legs are carrying the burden when using a multi-legged sling to sling a stiff object. Choker - Slings that are fitted with this hitch only reach foot around 75% of their maximum capacity because of the stress exerted at the choke point.The diameter around which the sling is bent divided by the sling's body diameter is known as the D/d Ratio. A cradle can be formed by passing a sling, whether synthetic or not, around the weight to offer support, but you must make sure that it is well fastened.
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We usually choose a mini-batch size greater than 1 and less than mm, because that way we make use of vectorization but not fall into the slower case of batch gradient descent.true/false
The answer is TRUE we choose between ,We usually choose a mini-batch size greater than 1 and less than mm
Why do we choose the batch gradient between 1 and mm?
You forfeit the advantages of vectorization across examples in a mini-batch if the size is 1.If the mini-batch size is m, batch gradient descent results, which must first process the entire training set before progressing.Mini batch in batch gradient:
In a variant of the gradient descent algorithm known as mini-batch gradient descent, the training dataset is divided into smaller batches that are then used to compute model error and update model coefficients. The variance of the gradient can be further reduced by implementations Mini-batch sizes are frequently determined as powers of 2, such as 16, 32, 64, 128, 256, etc. Make sure the minibatch fits in the CPU/GPU when selecting a suitable size for gradient descent. In general, selecting 32 is wise, summing the gradient over the mini-batch.
Hence to conclude the mini-batch size should be between 1 and less than 1 mm
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an aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of . it has been determined that fracture results at a stress of
The correct answer is Plain strain fracture toughness for aluminum alloy.
The plane strain fracture toughness is 27.5 MPa m 1 2 . KIc values obtained from specimens of different crack plane orientations were found to remain constant, indicating the lack of anisotropy in the material.Features of strength and fracture in aluminum alloys. Since many second phase particles are contained, the fracture of aluminum alloys is the ductile fracture of the dimple formation type.
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Provide the type and assembly language instruction for the following binary value: 0000 0010 0001 0000 1000 0000 0010 0000two
Assembly is essentially binary code written in a way that people can read it. The assembler then converts the assembly code, line by line, to the corresponding bit code.
What is the difference between Assembly and binary?In essence, assembly is binary code that has been translated into a language that people can read. Then, the assembler takes the assembly code and converts it bit-by-bit to the corresponding bit code.Imagine that there is a table with a line for each potential assembly statement. The statement itself is next on each line, followed by the corresponding bits that the computer can understand on the right.Even so, assemblers also have supplementary features like macros and other features, but the aforementioned functionality is their primary functionality.Binary is just a numbering scheme to programmers. For instance, base2 contains some 0s and 1s. These binary numbers are used by all computers. They interpret the instructions as a list of these numbers. They are not affected by the human-generated code, which is typically produced using a high-level programming language like Python, Java, and others.It is obvious that machine instructions in computers are not really human-readable - most people cannot determine the operational difference between 100010001... and 010001000... by simply looking at a binary or hex representation of the instruction bytes. Simply put, these instructions are machine codes.For instance, in the x86-16 architecture, the following instruction is used as the machine code for loading a value into a register: With a 2-bit addressing mode field and a 3-bit base register, the formula 8B 0E 34 12 denotes mov r16, r/m16, and which register the destination is (in this case, CX). For the avoidance of doubt, the Machine Code is represented using HEX code. Actually, it is simple to translate it to binary, and you have already mentioned that it is "10001011000011100011010000010010. Just like a string of ASCII 0 and 1 but more condensed, HEX is a text serialization format for binary numbers.Such binray/HEX instructions are readable by humans thanks to assembly, which is a higher level programming language than machine code. Using the machine code 8B 0E 34 12 as an example, MOV CX, [1234H] would be the result of decoding and disassembling the code.To Learn more about Assembly refer to:
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Most solar hot water systems are fitted with gas or electric "boosters" that can also heat the water. Describe why you think these are necessary.
Most solar water heaters have a gas or electric booster to give hot water on overcast days or when supply is insufficient.
Except when heat pumps are employed or renewable electricity is used, a gas booster often emits fewer greenhouse gases. In most parts of the world, a home's roof and walls receive far more solar energy than its people use in a year. We can get all the energy we require in a clean, easy, and natural method by harnessing the light and heat of this sun. In homes and commercial buildings, it can be absorbed in solar collectors to provide hot water or space heating. Parabolic mirrors may focus it to produce heat that can reach temperatures of up to several thousand degrees Celsius.
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1. The amount of friction developed between two
moving parts depends on all of the following factors,
except:
(A) the type of material.
(B) surface finish.
(C) pressure between moving parts.
(D) color pigment found in the parts.
The amount of friction developed between two moving parts depends on all of the following factors, except the color pigment found in the parts.
What is friction?
The force that stops solid surfaces, fluid layers, and material elements from sliding against one another is known as friction. There are various kinds of friction: Dry friction is the force that opposes the relative lateral motion of two in touch solid surfaces. Dry friction is classified as static friction between stationary surfaces and kinetic friction between moving surfaces. Dry friction, with the exception of atom or molecular friction, is caused by the interaction of surface characteristics known as asperities. Fluid friction is the friction that occurs between moving layers of a viscous fluid.
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a centrifugal pump with a 6-in diameter impeller has the performance characteristics shown below when operating at 3500 rpm. if the pump speed is reduced by 20% while continuing to operate at peak efficiency, what are the new operating conditions for flow [gpm] and head [ft]?
A centrifugal pump's capacity for producing head is directly correlated with the impeller's diameter.
The Callisto module Voicemail is a modern, secure, and flexible voicemail system that offers a variety of choices for application, setup, notification, administration, and interception. To determine the impeller's diameter, stretch the tape measure across its center and align it with the very tip of the blade right across from the first blade. Two important factors that affect the centrifugal pump's performance are the flow rate and the pump head. The stability of centrifugal pump operation and the range of flow regulation are directly impacted by the shape of the H-Q curves. Additionally, a speed-based variable torque value is required for this pump.
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A soda can has a strain gage mounted on the surface of the can. upon opening the can, the strain gage shows that in the circumferential direction, the can was released from a strain of 0.0010. if the can has a radius of 3 cm, a wall thickness of 0.13 mm, and was made from an aluminum alloy with modulus of elasticity 70 gpa, compute the pressure that was inside the can before it was opened. report your answer in kpa relative to atmospheric pressure (i.e., the difference in pressure between the inside of the can and the surrounding atmosphere).
A pressure gradient is the differential in pressure between high and low pressure areas. At sea level, the average air pressure is around 101,000 Pa, or 101 kPa (kiloPascals).
How do you determine a strain gauge's value?Pressure in thin walled pressure vessels must be continuously monitored, according to ASME boiler rules. A cylinder with thin walls has a wall thickness of r/10, where r is the cylinder's radius. In this case, just the membrane stresses are taken into account, and it is assumed that they remain constant over the entire t-value for the wall thickness.A stress study of the tank's cross section, such as one along the following line, can be used to determine the hoop stress.Remember that in this situation, the relationship between strain and stress is eHoop = (sHoop - n sLong)/E (3), which may be rearranged for pressure by replacing Eqs. 1 and 2 into 3:P is equal to ete/[r (1 - n/2)] (4) where elastic modulus E = 12.7 x 106 psi and Poisson's ratio n = 0.30.for the test pressure vessels we used. Consequently, the pressure inside the tank can be immediately determined by a strain gauge positioned externally in the circumferential direction of the vessel.To learn more about ASME boiler rules refer to:
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find the design stage uncertainty in the measurement when measuring a relatively higher pressure of 303 kpa
Uncertainty analysis at the design stage refers to a preliminary analysis carried out before the measurement.
Explain about the design stage uncertainty?
The causes of error that affect a measurement cannot be provided by design stage uncertainty analysis, but it can provide information and evaluate methods for instrument selection.
The precision and accuracy of the measuring device, as well as any other elements that can impair the experimenter's capacity to make the measurement, serve to restrict the uncertainty of a single measurement, and it is the experimenter's responsibility to calculate the uncertainty.
Zero-Order Uncertainty is a prediction of the anticipated uncertainty resulting from reading the data (interpretation error or quantization error). This fault is thought to be smaller than the instrumentation error.
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