When a heater is turned on, the fuse wire repeatedly gets burnt even after changing the same fuse wire with the same length and width, the wire keeps getting burnt. Which of the following is advisable?
Answers
First, because a current greater than its capacity is being flowed through, the fuse burns out repeatedly. Now,. I and R have an inverse relationship (current). The fuse wire's length and current rating are independent. Fuse wire is capable of carrying electricity over any distance, but thickness—which regulates melting—is crucial.
Why does fuse wire burn?All of the circuit's current flows through a metal ribbon that is inside the fuse. If too much current flows through the ribbon—which is sized to fit the gauge of the circuit wire—it melts through or "blows," and the circuit is destroyed.(ii) The fuse wire's length and current rating are independent. Fuse wire is capable of carrying electricity over any distance, but thickness—which regulates melting—is crucial.If the current is too high, the element heats up to a greater temperature, melts immediately, or melts a soldered junction inside the fuse, opening the circuit and cutting off the current. Therefore, it is irrelevant how long the fuse wire is.To learn more about Fuse wire refer to:
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Related Questions
A___ remote control can be an advantage to an
operator who is welding close to the power source.
•wireless
•corded
•cable technology
•none of these
Answers
Answer:
Wireless
Explanation:
A wireless remote control can be an advantage to an operator who is welding close to the power source. Hence, option A is correct.
What is wireless remote control?An electrical device used to wirelessly and remotely operate another device is a remote control, often known as a remote or clicker. Consumer gadgets, such as television sets, DVD players, and other home appliances, can be controlled by a remote control.
In the current electronic market, remote control systems fall into three primary categories: IR-based systems, RD-based systems, and BT-based systems. the receiver and the remote must be lined up exactly for infrared, also known as IR.
IR, on the other hand, is unable to pass through a number of materials but can operate over a much wider spectrum. This allows the user far greater freedom and control in environments with challenging terrain and obstacles.
Thus, option A is correct.
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Mark the right alternatives: A) If the moments of inertia of a disk and a cylinder are I1 and I 2 respectively, then the moment of inertia of the disk-cylinder system is 11+12. (True or Flase) B) An old model of car changes speed from 0 to 2v in a time interval Δt. A new sports car changes from 0 to v in the same period. Compare the power of the two cars. Consider that both cars have a similar mass. (select the right alternative or alternatives) - The powers of both tanks are equal. - The old car has more power than the new one. - Cannot be determined, data is missing. - The new car has more power than the old one.
Answers
The power of the old car is half that of the new car. Therefore, the correct alternative is "The new car has more power than the old one."
A) If the moments of inertia of a disk and a cylinder are I1 and I 2 respectively, then the moment of inertia of the disk-cylinder system is 11+12. (True or False)This statement is false. According to the parallel axis theorem, the moment of inertia of the disk-cylinder system is I1 + I2 and not 11 + 12.B) An old model of car changes speed from 0 to 2v in a time interval Δt. A new sports car changes from 0 to v in the same period. Compare the power of the two cars. Consider that both cars have a similar mass.The formula for power is given by P = W/t, where P is the power, W is the work, and t is the time taken. We can assume that the mass of both cars is m.Both the cars have similar masses, but they have different velocities. The work done is given by W = (1/2)mv^2, where m is the mass, and v is the velocity.Substituting the values of W, and t into the formula for power, we have:P1 = W/Δt1 = (1/2)mv^2/Δt1P2 = W/Δt2 = (1/2)m(2v)^2/Δt2 = 2mv^2/Δt2Therefore, the power of the old car is P1 = (1/2)mv^2/Δt1 = 1/2P2
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The object in ....................... shadow is not seen completely
Answers
Answer:
Dark shadow
Explanation:
Shadow is nothing but space when the light is blocked by an opaque object. It is just that part where light does not reach. When you stand in the sun, you are able to see your shadow behind you. ... This is because our body is opaque and does not allow the light to pass through it
Mark brainliest
1. The only purpose of a personal fall arrest system is to
A) Keep workers from falling
B) Hoist materials
C) Avoid having to use a
net
D)All of the above
Answers
✅C) Avoid having to use a net ✅
IamSugarBee
using the what-if function in excel to make a decision is considered a type of __________.
Answers
A forecast as well as scenario model is a form of decision-making tool that uses the what-if Excel function.
What purposes does Excel serve?Users of Microsoft Excel may format, arrange, and compute data together in spreadsheet. Data analysts or other customers can make data simpler to examine when data is added as well as altered by arranging the data using tools like Excel. The boxes in Excel are referred to as cells, and they are arranged in columns or rows.
What is a formula in Excel?In Microsoft Excel, an formula seems to be an expression that changes the values of a group of cells. These equations nevertheless provide a result, even if it's erroneous. Using Excel formulas, you may do operations like addition, subtraction, multiplication, as well as division.
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3/4 + 1/2
Ashskfnrjcisj
Answers
What does efficiency measure?
Answers
Answer:
Efficiency is defined as any performance that uses the fewest number of inputs to produce the greatest number of outputs. Simply put, you're efficient if you get more out of less.
Explanation:
Need help fast 50 points Project: Creating a Morphological Matrix
Assignment Directions
A systematic way to view common functionality of an object's structure and components is through a morphological matrix. You are going to utilize this method to analyze a common household device (from the list below or your own idea). First, create the left-hand column by deciding on the parameters that allow the object to function normally. For example, a pencil sharpener has a blade and a housing unit to support the system. Use the parameters to describe the system. If the pencil sharpener is hand operated, list the parameter of hand turning (either the pencil itself in a small unit or a handle in a wall-mounted device). The parameter column can include specific structures in the device, power sources, or any other information you learned in the lesson. The right-hand columns will include the current methods used by the device to complete the parameter, as well as any other options that would satisfy the parameter. You must create at least two other options for each parameter.
While the matrix provides valuable information for an engineer, it is typically more technological than a client or decision team needs. Therefore, you will also need to complete a one- or two-page analysis of the device, including the current parameter solutions and any recommended alterations to a design. Each recommendation must be supported by information in the morphological matrix.
Here are some ideas of household devices that you can analyze:
can opener
bathroom or kitchen scale
doorknob assembly
stapler
Assignment Guidelines
a completed morphological matrix
each parameter must have at least three solutions
a written analysis of the device with supporting details from the matrix
Submission Requirements
One to two pages double spaced
Proper grammar and vocabulary is required.
Answers
Answer:
The fundamental difference between effective and less effective matrix organizations is whether the tension between different perspectives is creative or destructive. While various processes, systems and tools can help, what matters most is what top leadership says and does and how that flows through the organization in shared targets, clear accountabilities, live team interactions and team-building transparency and behaviors.
Getting matrix management right is linked inextricably to an organization’s culture - the only sustainable competitive advantage. Key components of a culture can be grouped into behaviors, relationships, attitudes, values and the environment.
Environment and values: Each organization has its own environment, context and bedrock values. Everyone needs to know what matters and why. Don’t try to do anything else until you’ve got that set.
Attitude is about choices: An organization’s overall strategy drives choices about which of its parts will be best in class (superior), world class (parity), strong (above average), or simplified/outsourced to be good enough. These choices help determine the need for a matrix and how best to design it.
Relationships and behaviors: This is why organizations have matrices. The most effective of them best balance focus and collaboration. They allow leaders and teams to build differential strengths and then work together to make the best possible decisions and scale enterprises with a creative tension that they could not do on their own.
My colleague Joe Durrett has worked all sides of matrix organizations in marketing at Procter & Gamble, sales and general management at Kraft General Foods and CEO of Information Resources, Broderbund Software and Advo. He has seen matrices at their best and at their worst and offered his perspective for this article along with his partners John Lawler and Linda Hlavac. The 12 ways to make matrix organizations more effective were built on their ideas.
Explanation:
Which of the following accurately describes how switches and hubs work? (Select two) A. A switch uses the logical addresses in a packet to send it through the correct port to all VLANS defined on that port B. A hub repeats frames to all ports, regardless of the destination address C. Switches use the hardware address in the frame to send it only to the port where the device is located D. A hub uses the hardware address in the frame to forward it to the hosts on the VLAN that corresponds to that address
Answers
The following accurately describes how switches and hubs work
C. Switches use the hardware address in the frame to send it only to the port where the device is located.
B. A hub repeats frames to all ports, regardless of the destination address.
The option A is partially correct but not completely. A switch uses the logical addresses in a packet to send it through the correct port to a specific device, not to all VLANs defined on that port. Therefore, options C and B are the most accurate descriptions of how switches and hubs work, respectively.
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Sharon has just invented a new tractor that will plow and plant a new hybrid of corn at the same time. Which type of engineer is she?
Answers
Answer:
Agricultural engineer
Find and write the mathematical problem formulation of shortest path problem
Answers
Shortest path (A, C, E, D, F) between vertices A and F in the weighted directed graph
The problem of finding the shortest path between two intersections on a road map may be modeled as a special case of the shortest path problem in graphs, where the vertices correspond to intersections and the edges correspond to road segments, each weighted by the length of the segment.
who designs each page or screen with which a user interacts?
Answers
Answer:
UI Design
Explanation:
write a java script function that allows the user to enter and convert Kenyan shillings into US dollars when a button is clicked on a web page. rate is 1 $ dollar 115 Ksh
Answers
Answer:
Explanation:
Like requested the following function is written in JavaScript and prompts the user for a total amount of Kenyan Currency that needs to be converted. It then places that value in a variable and divides it by 115 Ksh so that it gives us the USD value of that currency. Then that value is returned. The function can be attached to any button but it must be done manually when creating the button's onClick method.
function convertCurrency() {
var KenyanAmount = prompt("Please enter the amount of Kenyan you want to convert.");
var usdValue = "$" + (KenyanAmount / 115);
return usdValue;
}
The program is a sequential program, and does not require loops and conditional statements
The function in JavaScript where comments are used to explain each line is as follows:
//This defines the function
function convertCurrency() {
//This gets input for the amount to convert
var Amount = prompt("Kenyan Shillings: ");
//This converts the Kenyan Shillings to US Dollars
var usdValue = KenyanAmount / 115;
//This returns the converted amount to the main method
return usdValue;
}
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During an internal audit, the auditor observed a test demonstration. According to the test standard, the test shall be carried out in 22±1°C. However, the auditor found that the temperature inside the room was 23.5°C during the demonstration. After some discussion with the laboratory supervisor, auditor noted that the room was controlled in 20-25°C. He raised a nonconformity to the laboratory. (a) Which the most appropriate clause in ISO/IEC 17025: 2017 should be used for raising this nonconformity? [2 marks] (b) To rectify this nonconformity, the laboratory proposed to move the setup of this test to another room with temperature control range of 22 ± 1 °C and provide training to all laboratory staff. Do you think these are proper corrective action? Briefly illustrate your answer.
Answers
(a) The most appropriate clause in ISO/IEC 17025:2017 for raising this nonconformity is Clause 7.6.1 - Control of Monitoring and Measuring Equipment.
(b) Moving the test setup to a room with proper temperature control and providing training to staff are proper corrective actions.
How does ISO/IEC 17025:2017 address nonconformity related to temperature control?The most appropriate clause in ISO/IEC 17025:2017 to raise this nonconformity would be Clause 7.6.1 - Control of Monitoring and Measuring Equipment. This clause requires laboratories to have processes in place to ensure that monitoring and measuring equipment used for testing and calibration are controlled and calibrated to provide valid results.
In this case, the temperature inside the room during the test demonstration did not meet the specified requirement of 22±1°C, indicating a nonconformity in the control of the monitoring and measuring equipment (temperature control system).
How do the proposed corrective actions address the nonconformity related to temperature control ?Moving the setup of the test to another room with a temperature control range of 22±1°C and providing training to all laboratory staff can be considered as proper corrective actions. By moving to a room with better temperature control, the laboratory ensures that future tests are conducted within the specified temperature range. This helps in meeting the test standard requirements and improves the accuracy and reliability of the test results.
Providing training to all laboratory staff is also important as it ensures that everyone is aware of the temperature requirements and understands the importance of maintaining and monitoring the temperature during tests. This helps in preventing similar nonconformities in the future and promotes a culture of adherence to standards and procedures.
Overall, these corrective actions address the identified nonconformity by implementing measures to rectify the temperature control issue and enhance the laboratory's ability to consistently provide accurate and reliable test results.
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A kitchen contains one section of counter that's 20 inches
long, one section that's 10 inches long, one section that's
32 feet long, and an island that's 4 feet long. How many
receptacles are needed for all of these areas?
A. Two
B. Three
C. Four
D. Five
Answers
The number of receptacles that are needed for all of these kitchen areas are: C. Four.
What are receptacles?Receptacles can be defined as types of sockets or series of outlets (openings) that provides a path where current can be taken in a wiring system, so as to run electrical appliances in buildings.
Based on the information provided, the number of receptacles that are needed for all of these kitchen areas are four because one would be used in each area.
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You are using an approved third party tool in your client project and find a bug in it. This is causing severe delays. Can you decompile the third party code to remedy the bug? a. Yes, I can decompile the code as the delay may result in an escalation by the client. b. Yes, I can decompile the code after obtaining my project managers approval, without approaching the third party tool owner.
c. No, Decompilation of the code is violation of the third partys intellectual property rights. d. Since we have approval to use the third-party tool, it is ok to decomplie it.
Answers
c. No, decompilation of the code is a violation of the third party's intellectual property rights.
Decompiling the code without the explicit permission of the third-party tool owner is generally considered unethical and illegal. Intellectual property rights protect the ownership and rights of the original code creator. Decompiling their code without proper authorization is a violation of those rights.
If you encounter a bug in a third-party tool, the appropriate course of action is to report the bug to the tool owner or provider. They are responsible for addressing and fixing the issue. It is not acceptable to decompile the code without their permission, even if there are delays or escalations in the project.
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Define a class named FootballPlayer that has 4 attributes: firstName (a string), lastName
(also a string), weight (in decimal pounds), and uniform number (an integer). Then derive
from this class two other classes: Quarterback and RunningBack. The Quarterback class
will be the class that you defined in Homework 2. The RunningBack class should add the
following attributes: attempts, yards, and touchdowns. Each class should have appropriate
accessor functions. Test the program by enabling the user to enter data for a lineman (a generic
FootballPlayer), a Quarterback, and a RunningBack, then display this information.
EXTRA CREDIT!!! We did not cover the topic of nested classes. However, if
you wish to do some research into the topic ... add a fifth component to
FootballPlayer: height, which should be a type Dimension that we defined in
class. Add it to the list of items that the user inputs and that are printed as output.
Answers
Below is an example of a type of implementation of the FootballPlayer, Quarterback, as well as the RunningBack classes in Python:
What is the class?Python is known to be one that is used to support software developers in a variety of capacities, including build control and management, testing, and many others. For build control, use SCons.
Therefore note that Python is said to be considered as one of the simplest programming languages to learn for novices. Python is a good location to start learning a programming language if you're interested in doing so.
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What happens when EPU output exceeds 32.5 volts
Answers
Answer:
In general, exceeding the rated voltage output of a power supply or electrical system could cause damage to the components being powered by that system. In some cases, this could result in the components malfunctioning or becoming permanently damaged, potentially leading to system failure. Additionally, exceeding the rated voltage of a system could cause electrical arcing or fires, which could be dangerous or catastrophic depending on the system and the environment it is operating in. Therefore, it is generally important to ensure that electrical systems are designed to operate within their rated voltage ranges to prevent damage and ensure safety.
A steel bar with a diameter of .875 inches and a length of 15.0 ft is axially loaded with a force of 21.6 kip. The modulus of elasticity of the steel is 29 *106 psi. Determine
Answers
Answer:
35.92 kpsi
Explanation:
Given data:
diameter of the steel bar d = 0.875 in
Area A = πd^2/4 = π(0.875)^2/4
length L = 15.0 ft
Load P = 21.6 kip
Modulus of elesticity E = 29×10^6 Psi
Assume we are asked to determine axial stress in the bar which is given as
\(\sigma = Load, P/ Area, A\)
\(\sigma = 4P/\pi d^2\)
substitute the value
\(\sigma = \frac{4\times 21.6}{\pi \times (0.875)^2} \\=35.92\ kpsi\)
A signalized intersection has a sum of critical flow ratios of 0.72 and a total cycle lost time of 12 seconds. Assuming a critical intersection v/c ration of 0.9, calculate the minimum necessary cycle length.
Answers
Answer:
\(T_o=82.1sec\)
Explanation:
From the question we are told that:
Lost Time \(t=12secs\)
Sum of critical flow ratios \(X=0.72\)
Generally the Webster Method's equation for Optimum cycle time is is mathematically given by
\(T_o=\frac{1.5t+5}{1-x}\)
\(T_o=\frac{1.5*12+5}{1-0.72}\)
\(T_o=82.1sec\)
What are some of the most complex building types to design?.
Answers
A house has all the ingredients that you will find in far more complex buildings. On top of that, they are there in small quantities.
Nearly every house has a kitchen, bathroom, laundry and toilet. You will also find some of these in hospitals, hotels, parking stations, office blocks, sewerage works, defence facilities and so on.
The only difference is that in a house, there may only be one of these and it must be the right size, shape and position so that it is suitable for use. Even the doorways must be positioned correctly - to allow for ventilation, light, privacy , ease of access, safety and even feng-shui.
Each room must be the right size for its’ occupants and its’ usage. Bedrooms should have a window or some other method of providing natural light. Toilets and bathrooms should allow for privacy.
The materials that it is built of should be fit for purpose. The roof should provide shelter from the elements. The walls should be able to support the weight of the roof and provide shelter and security for the occupants. The floor should be stable and strong and able to support the activities that are carried out in the house.
On top of all that, it must look good - to somebody. It also must be comfortable to live in, otherwise the design is a fail. That doesn’t mean that it shouldn’t be cheap to build. A good designer designs with one eye on the asthetics, the other eye on the usage and utility and his hand firmly closed around the cheque-book.
Assignment: Explain any three
ways that research can facilitate
the work of building technicians.
Answers
The three ways that research can facilitate the work of building technicians is that:
They will know the timeframe to start and complete the buildingThey will know the type and right materials to use.It will help them in the area of budgeting of equipment, tools and building materials needed.What do building technicians do?Building technicians are known to be people who help with some tasks around construction projects and building works.
Note that building technician overseeing a scope of tasks such as monitoring build progress and as such The three ways that research can facilitate the work of building technicians is that:
They will know the timeframe to start and complete the buildingThey will know the type and right materials to use.It will help them in the area of budgeting of equipment, tools and building materials needed.Learn more about technicians from
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The most common type of pressure gauge is the 1. Piston 2. Linkage 3. Bourdon Tube 4. 5. Temperature
Answers
Answer:
Bourdon Tube gauge
Explanation:
The most popular type of pressure gauge in several countries is the Bourdon pressure tube gauge, that is used to determine medium and high loads. Bourdon tube will measure pressures ranging between 600 mbar - 4,000 bar. While the inner pressure is greater than the exterior pressure, the tube pushes forward, and vise versa.
What are the legal consequences of engineering solutions? Discuss with one real life examples. Please state the Code of Ethics and Engineers professional obligations in this case
Answers
Engineers play a crucial role in developing and implementing technological innovations to cater to the needs of society. However, if the engineering solutions do not comply with established codes of ethics and professional standards, the legal implications can be significant.
Engineers are expected to follow ethical standards to ensure that their engineering solutions meet safety, quality, and environmental criteria. The Code of Ethics of Engineers outlines the ethical principles, values, and practices that engineers should follow in their professional duties.
A violation of the Code of Ethics or a failure to comply with professional standards can lead to legal consequences. If an engineer's solution is not compliant with safety standards, the individual or company responsible for implementing that solution may face fines, penalties, or legal action. One real-life example of legal consequences resulting from engineering solutions is the Deepwater Horizon oil spill. In 2010, an explosion on the Deepwater Horizon oil rig caused a massive oil spill in the Gulf of Mexico, resulting in significant environmental and economic damage.
Investigations revealed that several engineering solutions that were implemented on the rig were not in compliance with safety standards. Engineers had also failed to follow established procedures for ensuring safety and environmental protection. As a result, BP, the company responsible for the rig, faced significant legal consequences, including fines, penalties, and legal action by affected parties. Engineers involved in the project also faced legal consequences, including loss of license and potential criminal charges.
Engineers have a professional obligation to ensure that their solutions meet safety, quality, and environmental criteria. This means that they should adhere to established codes of ethics, follow established procedures for ensuring safety, and ensure that their solutions are in compliance with relevant laws and regulations. They also have a responsibility to report any violations or issues that could impact the safety or environmental impact of their solutions. Failure to meet these obligations can lead to legal consequences and impact public trust in the engineering profession.
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A forecast Group of answer choices results from an uncertain process. support strategic planning. All of these answer choices are correct. predicts what will occur in the future.
Answers
A forecast is a prediction of what will occur in the future. This process can be uncertain due to the numerous variables and factors that can affect the outcome.
However, a strategic approach to forecasting can help support effective planning and decision-making. By analyzing trends and identifying potential risks and opportunities, a strategic forecast can provide valuable insights into the future, which can inform and guide strategic planning efforts. Therefore, all of the given answer choices are correct as a forecast group supports strategic planning and predicts what will occur in the future, despite the uncertain nature of the process.
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For an airplane to takeoff, thrust must be greater than drag and lift must be greater than weight.
Answers
Answer:
True
Explanation:
If the probability of a bit error is p, what is the probability of a single, double, and triple error in a 10-bit word? Express it in terms of p.
Answers
Answer:
single bit error: 10pdouble bit error: 45p²triple bit error: 120p³Explanation:
The probability of n bits being in error is 10Cn × p^n, where ...
10Cn = 10!/(n!(10-n!))
10C1 = 10
10C2 = 45
10C3 = 120
This is the product of the probability that n bits can be in error and the number of ways that n bits can be chosen from the 10 in the word.
n = 1: 10p
n = 2: 45p²
n = 3: 120p³
1 .8 A capillary tube is immersed vertically in a water container. Knowing that water (3) starts to evaporate when the pressure drops below 2 kPa, determine the maximum capillary rise and tube diameter for this maximum-rise case. Take the contact angle at the inner wall of the tube to be 6 0 and the surface tension to be 1.00 N/m
Answers
The maximum capillary rise and tube diameter for this maximum-rise case will be d=0.414× 10⁻⁴ m.
What do you mean by tube?
A tube, also known as tubing, is a long hollow cylinder that is used to transport fluids (liquids or gases) or to protect electrical and optical cables and wires.
Given that, P = 4 KPa
Contact angle = 6°
Surface tension = 1 N/m
Lets assume that atmospheric pressure = 100 KPa
Lets take that density of water = 1000kg/m³
So the capillarity rise h
h=ΔP/ρg
h= (100×1000-4×1000)/(1000×10)
h= 9.61 m
We know that for capillarity rise h
h=2σcosθ/rρg
r = 2σcosθ/hρg
r = (2×1cos4°)/(9.61×1000×10)
r = 0.207×10⁻⁴m
d=0.414× 10⁻⁴ m
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Calculate the "exact" alkalinity of the water in Problem 3-2 if the pH is 9.43.
Calculate the "approximate" alkalinity (in mg/L as CaCO3 ) of a water containing 120 mg/L of bicarbonate ion and 15 mg/L of carbonate ion.
Answers
Answer:
A) approximate alkalinity = 123.361 mg/l
B) exact alkalinity = 124.708 mg/l
Explanation:
Given data :
A) determine approximate alkalinity first
Bicarbonate ion = 120 mg/l
carbonate ion = 15 mg/l
Approximate alkalinity = ( carbonate ion ) * 50/30 + ( bicarbonate ion ) * 50/61
= 15 * (50/30) + 120*( 50/61 ) = 123.361 mg/l as CaCO3
B) calculate the exact alkalinity of the water if the pH = 9.43
pH + pOH = 14
9.43 + pOH = 14. therefore pOH = 14 - 9.43 = 4.57
[OH^- ] = 10^-4.57 = 2.692*10^-5 moles/l
[ OH^- ] = 2.692*10^-5 * 179/mole * 10^3 mg/g = 0.458 mg/l
[ H^+ ] = 10^-9.43 * 1 * 10^3 = 3.7154 * 10^-7 mg/l
therefore the exact alkalinity can be calculated as
= ( approximate alkalinity ) + ( [ OH^- ] * 50/17 ) - ( [ H^+ ] * 50/1 )
= 123.361 + ( 0.458 * 50/17 ) - ( 3.7154 * 10^-7 * 50/1 )
= 124.708 mg/l
B1) 20 pts. The thickness of each of the two sheets to be resistance spot welded is 3.5 mm. It is desired to form a weld nugget that is 5.5 mm in diameter and 5.0 mm thick after 0.3 sec welding time. The unit melting energy for a certain sheet metal is 9.5 J/mm3 . The electrical resistance between the surfaces is 140 micro ohms, and only one third of the electrical energy generated will be used to form the weld nugget (the rest being dissipated), determine the minimum current level required.
Answers
Answer:
minimum current level required = 8975.95 amperes
Explanation:
Given data:
diameter = 5.5 mm
length = 5.0 mm
T = 0.3
unit melting energy = 9.5 j/mm^3
electrical resistance = 140 micro ohms
thickness of each of the two sheets = 3.5mm
Determine the minimum current level required
first we calculate the volume of the weld nugget
v = \(\frac{\pi }{4} * D^2 * l\) = \(\frac{\pi }{4} * 5.5^2 * 5\) = 118.73 mm^3
next calculate the required melting energy
= volume of weld nugget * unit melting energy
= 118.73 * 9.5 = 1127.94 joules
next find the actual required electric energy
= required melting energy / efficiency
= 1127 .94 / ( 1/3 ) = 3383.84 J
TO DETERMINE THE CURRENT LEVEL REQUIRED use the relation below
electrical energy = I^2 * R * T
3383.84 / R*T = I^2
3383.84 / (( 140 * 10^-6 ) * 0.3 ) = I^2
therefore 8975.95 = I ( current )