A DC servomotor has a torque constant of 0.075 N-m/A and a voltage constant of 0.12 V/(rad/sec). The armature resistance is 2.5 Ohm. A terminal voltage of 24 V is used to operate the motor. Determine:
a) the starting torque generated by the motor just as the voltage is applied.
b) the maximum speed at a torque of zero.
c) the operating point of the motor when it is connected to a load whose torque characteristic is proportional to speed with a constant of proportionality = 0.0125 N-m/(rad/sec).
Answers
Answer:
The answer is below
Explanation:
Given that:
\(k_t=torque\ constant=0.075\ Nm/A\\\\k_v=voltage\ constant=0.12\ V/(rad/sec)\\\\R_a=armature \ resistance=2.5 \Omega\\\\V_t=terminal\ voltage=24\ V\\\\a)The \ starting\ current\ I_a\ is\ given \ as:\\\\I_a=\frac{V_t}{R_a} =\frac{24}{2.5} =9.6\ A\\\\The \ starting\ torque(T)\ is:\\\\T=k_tI_a=0.075*9.6=0.72\ N.m\)
b) The maximum speed occurs when the terminal voltage and back emf are equal to each other i.e.
\(V_t=e_b=k_v\omega\\\\\omega=\frac{V_t}{k_v}=\frac{24}{0.12} =200\ rad/s\)
c) The load torque is given as:
\(T_L=0.0125\Omega\\\\The\ motor\ torque \ is:\\\\T=k_t(\frac{V_t-k_v\omega}{R_a} )\\\\but\ T = T_L,hence:\\\\0.0125\omega=0.075(\frac{24-0.12\omega}{2.5} )\\\\0.03125\omega=1.8-0.009\omega\\\\0.04025\omega=1.8\\\\\omega=44.72\ rad/sec\\\\N=\frac{60\omega}{2\pi} =\frac{60*44.72}{2\pi} =427\ rpm\)
Related Questions
State Objectives for Manufacturing of the Covid 19
non-contact Scanning devices project
Answers
The objectives for the manufacturing of Covid-19 non-contact scanning devices project include ensuring high-quality production, meeting production targets, optimizing manufacturing processes, ensuring regulatory compliance, and implementing cost-effective measures.
The manufacturing objectives for the Covid-19 non-contact scanning devices project are multi-faceted. Firstly, the focus is on ensuring high-quality production, with strict quality control measures in place to ensure the devices meet the required standards and specifications. This includes conducting thorough testing and inspections at various stages of the manufacturing process.
Secondly, meeting production targets is crucial to ensure an adequate supply of scanning devices to meet the demand. This involves setting realistic production goals and implementing efficient production planning and scheduling strategies.
Optimizing manufacturing processes is another important objective. This includes streamlining the production line, reducing cycle times, and minimizing waste to enhance productivity and efficiency.
Regulatory compliance is a key consideration, and the manufacturing process must adhere to relevant guidelines and regulations to ensure the devices are safe and effective for use.
Lastly, implementing cost-effective measures is essential to ensure the project's financial viability. This involves identifying opportunities for cost reduction, such as sourcing materials at competitive prices, optimizing inventory management, and exploring efficient production techniques.
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state two disadvantages and two advantages of a simple manometer.
Answers
1. Easy to fabricate and relatively inexpensive.
2. Good accuracy.
Disadvantages include;
1. It is large in size and bulky.
2. It needs leveling.
wall switch–controlled lighting outlets are not required in commercial occupancies, except for ____ containing equipment that requires servicing.
Answers
Wall switch-controlled lighting outlets are required in all areas of commercial occupancies except for equipment rooms containing equipment that requires servicing.
In commercial occupancies, such as offices, retail stores, restaurants, and other similar establishments, wall switch-controlled lighting outlets are a standard requirement. These outlets allow users to control the lighting in a particular area by easily switching them on or off using a wall-mounted switch.
wall switch-controlled lighting outlets may not be mandatory. These equipment rooms are designed to provide a controlled environment for specialized equipment, such as electrical panels, HVAC systems, server rooms, or other sensitive machinery. The absence of wall switch-controlled lighting outlets in these rooms can enhance safety by reducing the risk of accidental disruptions or power interruptions during equipment maintenance or servicing.
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A tiger cub has a pattern of stripes on it for that is similar to that of his parents where are the instructions stored that provide information for a tigers for a pattern
Answers
probably in it's chromosomes
technician a says that a 70 is a lower-profile tire than a 75. technician b says that an h rating is for higher speeds than a z rating. who is correct?
Answers
Technician A and Technician B are both partially correct. Technician A is correct in saying that a 70 is a lower-profile tire than a 75.
The aspect ratio of a tire is defined as the height of the tire from the rim to the tread, expressed as a percentage of the tire's width. A 70 aspect ratio tire has a height that is 70% of its width, whereas a 75 aspect ratio tire has a height that is 75% of its width. Therefore, a 70 aspect ratio tire is indeed a lower profile tire than a 75 aspect ratio tire.
Technician B is also partially correct in saying that an H rating is for higher speeds than a Z rating. The speed rating of a tire is a measurement of the maximum speed at which a tire is designed to operate. H rating tires are designed to operate at speeds up to 130 mph, while Z rated tires are designed to operate at speeds up to 149 mph or over. Therefore, it is correct to say that H rated tires are for higher speeds than Z rated tires.
However, it is important to note that the speed rating of a tire is not the only factor that determines a tire's performance or safety. Other factors, such as load capacity, handling, and traction, also play a significant role in determining a tire's suitability for a specific vehicle and driving conditions.
In conclusion, both Technician A and Technician B are partially correct. Technician A is correct in saying that a 70 is a lower-profile tire than a 75, and Technician B is correct in saying that an H rating is for higher speeds than a Z rating. However, it is important to consider other factors, such as load capacity, handling, and traction, in addition to the speed rating when selecting tires for a specific vehicle and driving conditions.
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A weld symbol below the reference line signifies a weld on the "ARROW" side of the joint.
Answers
What is the value of the boolean variable canVote at the end of this program?
var age = 17;
var isCitizen = true;
var canVote = age >= 18 && isCitizen;
Answers
he final value of the boolean variable `canVote` is `false`, as the `&&` operator requires both conditions to be true for the result to be true, but in this case, one condition is false.
The given program declares three variables, "age", "isCitizen", and "canVote". It then uses the logical AND operator to assign a value to the "canVote" variable based on the conditions that the "age" variable is greater than or equal to 18, and the "isCitizen" variable is true. The "age" variable is initialized to 17, and the "isCitizen" variable is set to true. When the program evaluates the expression "age >= 18", it returns false because 17 is not greater than or equal to 18. Since the first condition is false, the entire expression is evaluated as false, and the "canVote" variable is assigned a value of false. Therefore, at the end of this program, the value of the boolean variable "canVote" is false.
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Consider a stateful variant of CBC-mode encryption where the sender simply increments the IV by 1 each time a message is encrypted (rather than choosing IV at random each time). Show that the resulting scheme is not CPA-secure. (You may find the idea for the chosen-plaintext attack against Chained CBC shown in the textbook helpful.)
Answers
The stateful variant of CBC-mode encryption mentioned in the question is not CPA-secure because an attacker can easily predict the next IV and use it to launch a chosen-plaintext attack.
How the attack works:
The attacker chooses two plaintext messages, P1 and P2, of the same length.The attacker sends P1 to the sender and observes the resulting ciphertext C1.The attacker calculates the next IV by incrementing the IV used for C1 by 1.The attacker then sends P2 to the sender along with the calculated IV.The sender encrypts P2 using the provided IV and sends the resulting ciphertext C2 back to the attacker.The attacker can then compare C1 and C2 to determine if the same key was used for both encryptions.Since the attacker can predict the next IV and use it to launch a chosen-plaintext attack, the stateful variant of CBC-mode encryption is not CPA-secure. This is why it is important to choose a random IV for each encryption in order to ensure the security of the encryption scheme.
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The UHRS platform is optimized for Edge/Internet Explorer only. You can still use your favorite browser, but keep in mind that you may experience technical issues when working on UHRS with a different browser than Edge or Internet Explorer.
UHRS is optimized for...
Answers
It is to be noted that all UHRS platforms are optimized for the popular kinds of internet browser applications.
What is a UHRS?The Universal Human Relevance System (UHRS) is a crowdsourcing platform that allows for data labeling for a variety of AI application situations.
Vendor partners link people referred to as "judges" to offer data labeling at scale for us. All UHRS judges are bound by an NDA, ensuring that data is kept protected.
A browser is a software tool that allows you to see and interact with all of the knowledgeon the World Wide Web. Web sites, movies, and photos are all examples of this.
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3. (a) Describe the procedure of measuring the depth of modulation of an amplitude modulated (AM) wave using an oscilloscope with the internal timebase switched off and sketch the displayed waveform. (6 marks)
Answers
1. Connect the output of the AM transmitter to the vertical input of the oscilloscope.
2. Connect a DC voltmeter across the output of the AM transmitter.
3. Set the oscilloscope to DC coupling and adjust the vertical sensitivity so that the AM waveform is clearly visible on the screen.
4. Adjust the horizontal position of the waveform so that the unmodulated carrier is centered on the screen.
5. Adjust the DC voltmeter to read the unmodulated carrier voltage.
6. Adjust the AM modulation depth so that the AM waveform just reaches the maximum and minimum levels of the carrier waveform.
7. Read the DC voltmeter again to determine the new carrier voltage.
8. Calculate the modulation depth using the formula:
Modulation Depth = (Vmax - Vmin) / (Vmax + Vmin)
Where Vmax is the carrier voltage with modulation and Vmin is the carrier voltage without modulation.
The displayed waveform will show the unmodulated carrier waveform centered on the screen, with the modulated waveform superimposed on it. The depth of modulation can be determined by measuring the maximum and minimum levels of the modulated waveform and calculating the modulation depth using the formula above.
You have been working at a manufacturing site but have been
transitioned to a different part of the site with new responsbilities. When
should your employer train you on any chemical hazards in this new
responsibility?
Answers
Answer: The Hazard Communication Standard (HCS), 29 CFR 1910.1200 (h), requires all employers to provide information and training to their employees about the hazardous chemicals to which they may be exposed at the time of their initial assignment and whenever a new hazard is introduced into their work area.
Explanation: choose me as Brainliest
The required, if our new responsibilities involve working with hazardous chemicals, your employer should provide training on any chemical hazards before you begin working in that area
What are chemical hazards?Chemical hazards are any physical, chemical, or toxicological properties of a chemical that may cause harm to humans or the environment.
Here,
According to the Occupational Safety and Health Administration (OSHA) regulations, employers are required to provide hazard communication training to employees who may be exposed to hazardous chemicals as part of their job duties. The training must be provided at the time of initial assignment to a job involving exposure to hazardous chemicals, and whenever a new physical or health hazard is introduced to the workplace.
Therefore, if our new responsibilities involve working with hazardous chemicals, your employer should provide training on any chemical hazards before you begin working in that area. If any new hazardous chemicals are introduced into the workplace after your initial training, your employer should provide additional training on those specific hazards.
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Company X recently detected some strange text
messages being sent between customers. They
believe that these coded text messages are in
support of criminal activities. They want to be able to
automate the detection and escalation of these
messages to help avoid crime. The text message
seems to be a string of random alphanumeric
characters followed by a symbol (the last three
characters of the text message), but on closer
identification they notice that there are palindromes
within the text that correlate to spurious activity. A
palindrome is a word, phrase, or sequence that
reads the same backward as forward.
The challenge is to identify these palindromes and
assign a score. What we have noticed is the
following:
• In their scenario, a valid palindrome is defined
as having three or more characters in sequence
and can overlap each other in the sequence.
When there are two or more palindromes a
threat should be detected.
• The score can be calculated as the sum of the
length of all valid palindromes.
The cardinality of the score can be measured as
follows:
• 1-10 - Possible
• 11-40 - Probable
11-40 - Probable
• 41-150 - Escalate
• Otherwise - Ignore
As an analyst, you have been tasked to take the text
messages presented and write a programme that will
predict what your manager should do.
Constraints
• 1
All text messages will be followed by a three
character symbol
Answers
The process of developing application programs is called program development. The five stages of program development are analysis, design, coding, debugging and testing, and maintaining application software.
This process is known as the program development life cycle (PDLC). Program policies, issue-specific policies, and system-specific policies are the three categories of security policies that are frequently used.
Application software is a class of computer programs that controls how well a certain computer use—or application—performs in order to satisfy end users' information processing requirements.
Technical, administrative, and physical security controls are the three basic categories of IT security measures.
Security controls are divided into three main categories. These include physical security controls as well as managerial security and operational security measures.
A program is a noun that refers to a collection of instructions that process input, manipulate data, and produce a result. It is also referred to as an application or software. As an illustration, the word processing tool Microsoft Word enables users to generate and write documents.
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What is the purpose of the lines painted on the shop floor?
Answers
intune can manage windows, android, and ios devices. select yes if the statement is true. otherwise, select no.
Answers
Yes, the statement "Intune can manage Windows, Android, and iOS devices" is true.
Microsoft Intune is a cloud-based endpoint management solution that enables organizations to manage mobile devices, PCs, and applications from a single console. Intune helps you to manage your organization's devices and apps, including employee-owned devices, with or without a connection to your corporate network. It provides consistent and secure access to corporate resources such as email, OneDrive, and SharePoint, as well as a personalized self-service device enrollment portal.
To manage and protect all of your endpoints from a single location with Microsoft Intune, a family of endpoint management solutions. You have the ability to: Simplify administration by combining all of your endpoint management tools into a single solution.
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) Identify the reason leading to the common use of a 3-phase 4-wire system
Answers
The main reason for the common use of a 3-phase 4-wire system is the need to deliver power to different types of loads efficiently and effectively.
A 3-phase 4-wire system provides three alternating currents that are 120 degrees out of phase with each other. This type of system is commonly used in industrial and commercial settings because it can handle higher power loads than single-phase systems. The fourth wire is a neutral wire, which provides a return path for any unbalanced current in the system. This is important because it ensures that the voltage across each load remains balanced, which is necessary for the proper functioning of electrical equipment. Additionally, the use of a 3-phase system allows for the use of smaller and more efficient motors, reducing energy consumption and costs. Overall, the use of a 3-phase 4-wire system is essential for delivering power effectively and efficiently to various types of loads.
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what is geo technical
Answers
An automobile having a mass of 1100 kg initially moves along a level highway at 120 km/h relative to the highway. It then climbs a hill whose crest is 80 m above the level highway and parks at a rest area located there. Use a reference with kinetic and potential energy each equal to zero for the stationary highway before the hill. Let g = 9.81 m/s^2.
For the automobile, determine its change in kinetic energy and its change in potential energy, both in kJ. For the automobile, determine its change in kinetic energy, in kJ.
a. -8594
b. -663.1
c. -6.63x10^5
d. 663.1
Answers
Answer:
\(-6111.11\ \text{kJ}\)
\(863.28\ \text{kJ}\)
Explanation:
m = Mass of automobile = 1100 kg
v = Velocity of car = 120 km/h = \(\dfrac{120}{3.6}\ \text{m/s}\)
h = Height of hill = 80 m
g = Acceleration due to gravity = \(9.81\ \text{m/s}^2\)
Change in kinetic energy
\(KE=\dfrac{1}{2}m(u^2-v^2)\\\Rightarrow KE=\dfrac{1}{2}\times 1100\times (0-(\dfrac{120}{3.6})^2)\\\Rightarrow KE=-611111.11\ \text{J}\)
Change in kinetic energy is \(-6111.11\ \text{kJ}\)
Change in potential energy is given by
\(PE=mgh\\\Rightarrow PE=1100\times 9.81\times 80\\\Rightarrow PE=863280\ \text{J}\)
The change in potential energy is \(863.28\ \text{kJ}\).
The steel-frame structural support was a main feature in the development of __________. Group of answer choices
Answers
The steel-frame structural support was a main feature in the development of t the floors, roof, walls and skyscraper.
What structure is aided by a metal frame?Steel frame is known to be a form of a building method that is used along with a skeleton frame that is made up of steel columns and I-beams.
Conclusively, This is often used in the construction of grid to aid the floors, roof and walls of any kind of building. It is also used in the construction of skyscraper.
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Why weren’t car produced during world war 2
Answers
Answer:
Auto production stopped on Feb. 9, 1942, as factories switched over to making munitions for World War II. The industry retooled plants that could be adapted.
Answer:
9, 1942, as factories switched over to making munitions for World War II. The industry retooled plants that could be adapted. Car manufacturing equipment was replaced with what was needed to make planes and tanks, and floors were reinforced to carry the load of heavier machinery, according to Life magazine
Explanation:
4. A network has N subscribers. Each subscriber is connected directly to all other subscribers.
(a) What is the total number of lines L in the network?
(b) What is the value of L for N = 2, 10, 100, and 1,000?
(c) How many lines must be built to each subscriber?
(d) Is this kind of network structure suitable for a public telecommunications network? Explain
Answers
Answer:
a) Here, Total No. of subscribers=N
So, the total number of lines in the network, L = \(\frac{N(N-1)}{2}\)
b) If N=2, then L=1;
If N=10, then L=45;
If N=100, then L= 4950;
If N=1000, then L= 499500.
c) In a mesh topology network with N subscribers, (N–1) lines must be built to each subscriber.
d) No it is not suitable for a public telecommunications network.
Because it is costly and complex to implement. Needs more power to active all nodes. The nodes will face redundant connection problem etc.
Explanation:
a) Because each subscriber is directly connected to all other subscribers, the network follows a mesh topology.
b) If N=2,
L=\(\frac{2*(2-1)}{2}\) = 1.
If N=10,
L= \(\frac{10*(10-1)}{2}\) = 45.
If N=100,
L= \(\frac{100*(100-1)}{2}\) = 4950
If N=1000,
L= \(\frac{1000*(1000-1)}{2}\) = 499500.
Determine the design angle ϕ (0∘≤ϕ≤90 ∘) between struts AB and AC so that the 400 lb horizontal force has a component of 600 lb which acts up to the left, in the same direction as from B towards A. Take θ = 30 ∘.
Answers
Answer:
design angle ∅ = 4.9968 ≈ 5⁰
Explanation:
First calculate the force Fac :
Fac = \(\sqrt{400^2 + 650^2 - 2(400)(650)cos30}\)
= \(\sqrt{160000 + 422500 - 80210}\)
= 708.72 Ib
using the sine law to determine the design angle
\(\frac{sin}{400} = \frac{sin 30}{Fac}\)
hence ∅ = \(sin^{-1} (\frac{sin 30 *400}{708.72} )\)
= \(sin^{-1} 0.0871\) = 4.9968 ≈ 5⁰
The design angle of the struts system given is;
ϕ = 38.26°
Parallelogram law of vector additionThe diagram showing the struts system is missing and so i have attached it.
Now, from the forces given to us acting on the system attached, I have drawn a force diagram in form of a parallelogram showing the direction of the forces action. The second attached image shows this force diagram called diagram a.From the diagram, we can see that it follows parallelogram law of vector addition.
Now, I have narrowed down the force system to the upper part of the strut as depicted in the third image attached.
From the third image attached, we can use the concept of parallelogram law of vector addition and the law of cosine to get the force on the strut AC which is;F_AC = √(400² + 600² - 2(400 × 600)cos 30)
F_AC = 322.97 lb
Now, to get the design angle, we will solve as;(sinϕ)/(sin 30) = 400/322.97
Where; ϕ is the design angle.
Thus;
(sinϕ) = (400/322.97) × sin 30
(sinϕ) = 1.2385 × 0.5
(sinϕ) = 0.61925
ϕ = sin^(-1) 0.61925
ϕ = 38.26°
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What is the attenuation in db for a 4th order low pass filter at a frequency of 10fc, where fc is the filter's corner frequency?
Answers
Fourth-order Low Pass Filter If the gain of both filters is set at 1.586, the voltage gain will be down 6 dB at the cutoff frequency. We can get a more flat response by choosing different values of voltage gain for both stages.
What is a fourth order low pass filter ?It is possible to create a 4th order low-pass filter with just one Op Amp. Due to the interconnected nature of all filter parameters, component tolerance sensitivity needs to be confirmed. The 4th order Sallen-Key topology is too sensitive to component tolerances, making it unsuitable for application.
Formula fc= 1/(2πRC).
How to calculate the attenuation of a low pass filter?The attenuation rate for a low-pass or high-pass filter will be -20 times the filter order, expressed in decibels per decade. A first-order filter, for instance, will attenuate at a rate of -20 dB/decade, but a fourth-order filter will attenuate at a rate of about -80 dB/decade.
Attenuation (dB)= 10 X log(PI/PO)
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a hydraulic turbine is used to generate power by using the water in a dam. the elevation difference between the free surfaces upstream and downstream of the dam is 130 m. the water is supplied to the turbine at a rate of 150 kg/s. if the shaft power output from the turbine is 160 kw, determine the efficiency of the turbine.
Answers
To determine the efficiency of the hydraulic turbine, we can use the following formula:
Efficiency = (Shaft power output / Hydraulic power input) x 100%
The hydraulic power input can be calculated using the formula:
Hydraulic power input = (Water flow rate x Gravitational constant x Elevation difference) / 1000
Where,
Water flow rate = 150 kg/s
Gravitational constant = 9.81 m/s^2
Elevation difference = 130 m
Plugging in the values, we get:
Hydraulic power input = (150 x 9.81 x 130) / 1000 = 191.565 kW
Now, we can calculate the efficiency of the turbine:
Efficiency = (160 / 191.565) x 100% = 83.5%
Therefore, the efficiency of the hydraulic turbine is 83.5%.
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Identify the test in which a hole IS drilled in the exhaust pipe in front of the converter so that an emission analyzer tube can be inserted into the exhaust stream entering the converter:
Select one:
• A. EGR test
• B. Intrusive test
• C. Idling five-gas test
• D. Purge flow test
Answers
Answer:intrusive test
Explanation:
When a pungent odor is detected during a sealed system recovery and/or repair which of the following is most likely
Answers
Answer: A leak in the system
Explanation:
Use NORTHWIND database to perform following queries:
13. Get the Order Count by (Table:Orders)
I. Each Year (Hint: YEAR() function)
ii. Each quarter in each year (Hint: research on DATEPART() function)
iii. Each Month in each year (Hint: research on DATEPART() function)
14. Calculate Average, Total, Minimum, and Maximum Frieght paid (Table:Orders)
i. For each Order
ii. For each Company
iii. For each Country on all orders
iiv. for Each Carrier (ShipVia)
Answers
Get the Order Count by (Table: Orders)
I. Each Year (Hint: YEAR() function)ii. Each quarter in each year (Hint: research on DATEPART() function)iii. Each Month in each year (Hint: research on DATEPART() function)How can I retrieve the order count for each year, each quarter in each year, and each month in each year from the Orders table?To retrieve the order count for each year, each quarter in each year, and each month in each year from the Orders table in the NORTHWIND database, you can use the YEAR() function to group the orders by the year portion of the OrderDate column.
This will provide the order count for each year. To obtain the order count for each quarter in each year, you can use the DATEPART() function to group the orders by both the year and quarter portions of the OrderDate column. Lastly, to get the order count for each month in each year, you can again use the DATEPART() function to group the orders by both the year and month portions of the OrderDate column. These queries will help you analyze the order count trends over different time periods within the database.
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What do we need to build a car?
Answers
A Chief Information Officer (CIO) receives an email stating a dataspace will be encrypted within 24 hours unless a payment of $20,000 is credited to the account mentioned in the email. This BEST describes a scenario related to:
Whaling.
Smishing.
Spear phishing.
Vishing.
Answers
Spear phishing. Spear phishing is a form of cybercrime in which an attacker pretends to be a legitimate individual or entity and sends a malicious email to a specific target, often asking them to click a link or provide sensitive information.
Spear phishing is a form of cybercrime in which an attacker pretends to be a legitimate individual or entity and sends a malicious email to a specific target. In this case, the attacker is asking for a payment of $20,000 to avoid the encryption of the dataspace, making it a spear phishing attack. Spear phishing is a serious threat and can have serious consequences, so it is important to remain vigilant when receiving emails or links from unknown sources.
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the following questions need to answered please and thank you
Answers
Answer:
Can't see, clearly photo then you can get your answer quickly
Explanation:
Convenience items like liquid egg are a lot more expensive?
True
Or False
Answers
Answer:
True
Explanation:
It's just because of the processing