In the AC resistor circuit of Figure Q2.1, the voltage of the AC power source is

U = 100 sin(120pi x t) V .


what are

(a) the peak voltage of the AC power source

(b) the frequency of the alternating current in the circuit

(c) the instantaneous voltage of the power source at t = 20 ms

(d) the peak voltage across each resistor

(e) the instantaneous resistor voltages at t = 20 ms,

(f) to sketch the waveform of voltage in the first two periods

Answer:

a)

normal circular pitch = 7.8539 mm

transverse circular pitch = 9.0689 mm

axial circular pitches = 15.7077

b)

transverse diametral pitch is 0.3464 teeth/mm

transverse pressure angle is 22.8°

c)

Addendum = 2.5 mm

dedendum = 3.125 mm

pinion diameter = 54.8482 mm and Gear diameter = 164.5448 mm

Explanation:

Given that;

module m = 2.5 mm

Number of teeth on Gear  nG = 57 TEETH

Number of teeth on Pinion  nP = 19 TEETH

Helix angle W = 30°

Normal Pressure angle β = 20°

finding the circular pitch

Pc = πm

we substitute

Pc = π * 2.5 mm = 7.8539 mm

now the diametral pitch p = π / Pc

= π / 7.8539

= 0.4 teeth/mm

a)

So the normal circular pitch

Pn = π / P

Pn = π / 0.4

Pn = 7.8539 mm

the transverse circular pitch

Pt = Pn / cosW

Pt = 7.8539 / cos30°

Pt = 9.0689 mm

for axial circular pitches

Px = Pt / tanW

Px = 9.0689 / tan30°

Px = 15.7077

b)

The transverse diametral pitch and the transverse pressure angle.

The transverse diametral pitch Pt = PcosW

= 0.4 * cos30°

= 0.3464 teeth/mm

transverse diametral pitch is 0.3464 teeth/mm

transverse pressure angle  β1 = tan^-1 ( tan βn / cos W)

=  tan^-1 ( tan20° / cos 30°)

= tan^-1 ( 0.42027 )

β1 = 22.8°

transverse pressure angle is 22.8°

c)

The addendum, dedendum, and pitch diameter of each gear

Now from table standard Tooth proportions for Helical Gears;

Addendum a = 1/p

= 1 / 0.4

= 2.5 mm

dedendum b = 1.25 / p

= 1.25 / 0.4

= 3.125 mm

now  pinion diameter dP = Np / PcosW

= 19 / 0.4 (cos30°)

= 54.8482 mm

Gear diameter dG = nG / pcosW

= 57 / 0.4 (cos30°)

= 164.5448 mm

In HTML, the attribute used to specify that an input field must be filled out is "required" (option A). This attribute ensures that the user must provide a value for the input field before submitting the form, promoting proper form completion and data validation.

If the required attribute is not satisfied, the form will not be submitted, and the user will receive a prompt to fill in the necessary information. The attribute used to specify that an input field must be filled out in HTML is the "required" attribute. This attribute is used in conjunction with the "input" tag to indicate that the user must fill out the specified field before submitting the form. When the user tries to submit the form without filling out the required field, an error message will appear prompting them to fill out the required field. The "validate" and "mandatory" attributes are not used in HTML to achieve this functionality. While the term "input_required" could potentially be used as a custom attribute, it is not a standard attribute in HTML. Therefore, the correct answer is A) required.

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Answer:

Wizkid

Explanation:

wizkid is the best musician in Nigeria

Explanation:

I have no clue??????????

Answer:

1200

Explanation:

ohms is the si unit for resistance.

hence, 1.2 k(ohms) = 1200 ohms since k = kilo = ×1000

Answer:

pakipic na lang po question nyo para masagot po

Explanation:

please po di ko masyado gets po e

it is simple the title name after all it is just asking your name

Answer:

See the image for solution

Joint Information System (JIS) NIMS structure develops, recommends, and executes public information plans and strategies.

What is NIMS?
NIMS (National Incident Management System) is an incident-based, all-hazards approach to emergency management and response. It is designed to provide a consistent nationwide template to enable all government, private-sector, and nongovernmental organizations to work together during domestic incidents. NIMS is composed of a core set of components, including Incident Command System, Multiagency Coordination Systems, Comprehensive Preparedness Guide, and the National Incident Management System Integration Center. These components are designed to promote interoperability and compatibility among local, state, tribal, and federal emergency management agencies.

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Answer:

Your mobile phone has more computing power than the computers used for the Apollo 11 moon landing.

Mobile phones have to “work harder” to get a signal if you are in a moving vehicle.

The first mobile phone was made in 1973.

The first mobile phones that went on sale in 1983 cost nearly $4,000 each.

In 2012 Apple sold 340,000 phones per day.

4 out of 10 Brits admit to snooping on their partners phone.

Out of the 53% of snoopers that found incriminating evidence on their partner’s phone, 5% went on to terminate their relationship.

Waterproof mobile phones came to market because Japanese youngsters like to use them in the shower.

Apparently mobile phones have 18 times more bacteria on them than toilet handles!

Phubbing describes the act of snubbing someone by using your mobile phone in their company.

In 2015 more people died from taking selfies than shark attacks.

Teenagers that use a phone more than 2 hours a day increase their risk of depression and anxiety.

Nomobophobia is severe anxiety caused by the thought or act of losing your phone or running out of battery.

Explanation:

Therefore, the pressure of the flow downstream of the compression corner is approximately 26.274 atm.

To calculate the pressure of the flow downstream of the compression corner, we can use the conservation of total pressure across the expansion and compression corners. Assuming ideal gas behavior, the total pressure remains constant throughout the flow.

Given:

Mach number (M) = 3

Pressure (P1) = 3 atm

Expansion corner angle (θ1) = 20°

Compression corner angle (θ2) = 20°

We can use the following equation to calculate the pressure downstream of the compression corner:

P2 = P1 * (1 + [(γ - 1) / 2] * M^2)^(γ / (γ - 1))

where:

P2 is the pressure downstream of the compression corner

γ is the specific heat ratio of the gas

For air, the specific heat ratio (γ) is approximately 1.4.

Let's plug in the values and calculate the pressure:

P2 = 3 * (1 + [(1.4 - 1) / 2] * 3^2)^(1.4 / (1.4 - 1))

Simplifying the equation:

P2 = 3 * (1 + [0.4 / 2] * 9)^1.4

P2 = 3 * (1 + 0.2 * 9)^1.4

P2 = 3 * (1 + 1.8)^1.4

P2 = 3 * (2.8)^1.4

P2 ≈ 3 * 8.758

P2 ≈ 26.274 atm

Roundingto three decimal places:

P2 ≈ 26.274 atm

Therefore, the pressure of the flow downstream of the compression corner is approximately 26.274 atm.

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The unknown capacitor in arm CD must have a value of 330 microfarads, and the unknown resistor must have a value of 100 kilo-ohms.

To solve the problem, use the following formula:
Cseries = C1 x C2 / (C1 + C2)

Where C1 is the value of the capacitor in arm AB (47 microfarads) and C2 is the value of the capacitor in arm BC (330 microfarads).

Therefore, Cseries = 330 microfarads.

Also, the total resistance of arms CD is the sum of the resistance of the resistor (R) and the reciprocal of the capacitive reactance of the capacitor (1/Xc).

Using the following formula:
Rtotal = R + 1/Xc

Where Xc = 1/2πfC,

f is the frequency and C is the capacitance.

For this problem,

Xc = 1/2π(50)(330 x 10-6)

=> 100 kilo-ohm.

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The context-sensitive help feature of the Cisco IOS CLI provides users with two functions, which are:

1. Command completion - this feature helps users complete a command by typing a partial command and then pressing the Tab key. The CLI will suggest possible command completions based on what the user has typed so far.
2. Command syntax help - this feature provides users with information about the syntax and usage of a particular command. Users can type a command followed by a question mark (?) to see the available options and syntax for that command. Functions are self-contained blocks of code that perform a specific task and can be reused throughout a program. They take input parameters, perform operations on those inputs, and then return a result. Functions can help to break up large programs into smaller, more manageable parts, and can improve code readability, maintainability, and reusability. They are a fundamental building block of most programming languages and are used extensively in software development to achieve a wide range of tasks.

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The capacitor's charge and voltage are both still zero immediately after the switch is closed because it has not had time to charge up.

The relationship is denoted by the equation q=CV, where q is the stored charge, C is the capacitance, and V is the applied voltage. One might wonder, after looking at this formula, what would happen if the capacitance was changed while the charge remained constant. Of course, the voltage will change in response to this. A capacitor's capacitance (C) and the voltage (V) that is applied to it are multiplied together to form the charge (Q) that is stored there. A capacitor's capacitance should always be a constant, predetermined value. So, we can change the voltage to change the cap's charge. Less voltage equals less charge, and more voltage equals more charge. One of the plates of a charged capacitor is positively charged, and the other plate has an equal amount of negative charge.

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Answer:

Time delay increases

Explanation:

Time delay is the delay between occurance of signal. If sampling time that is time between two samples is increased, the delay in the occurance of regenerated samples is also increased.

The family should accept a minimum of Kshs.42,250,000.00 to avoid incurring a loss.

To obtain the total cost, the expenses for the land, trees and upkeep are summed up and subsequently reduced by 6. 5% using a discount rate.

Hence, it can be seen that a forced acquisition appraisal primarily focuses on three key factors: the land's market value, the expenses involved in replacing the property, and the potential harm caused to the owner's belongings.

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The future departure system's development trend in the construction of smart airports is focused on improving productivity, automation, and passenger experience.

Airports are investing in intelligent solutions to streamline the departure process in response to technological improvements and the rising demand for air travel.

These solutions are designed to shorten wait times, enhance security, and facilitate smooth travel.

Significant development regions consist of:

The departure system, which works closely with other systems to guarantee that air travel runs without a hitch, is an essential feature of the civil aviation transportation system.

You can sum up its interaction with other systems as follows:

Thus, the aviation transportation system is essential for ensuring that planes depart on time and in an organised manner, maximising passenger flow.

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Answer:

Use a non digital multimeter.

Explanation:

If a digital multimeter displays "000" when reading amperage, the technician should adjust the multimeter to a higher amperage range.

This is because "000" typically indicates that the current being measured is too low for the current range selected on the multimeter.

By switching to a higher amperage range, the technician can get a more accurate reading and ensure that the multimeter is properly measuring the current in the circuit under test.

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The flashing arrow panels are not used just at night but are used even during the day time. These are necessary to give the directional information to the drivers. Thus, the given statement is false.

The safety instructions are necessary for the drivers as absence of these would lead to increased number of accidents which could lead to death of a number of people. The flashing arrow panels is one of these instructions.

Flashing arrow panels are used during the day as well as at the night to give advance warning and directional information to the drivers where it is required to move to the right or to the left into another lane.

Some of the safety systems used at level crossings include amber and red warning lights on majority of roads, people should stop when the amber lights come on, unless vehicle has already crossed the stop line.

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Approximately 90% of our driving clues depend on vision.

This is because we rely heavily on our visual perception to navigate through the environment, interpret road signs, and detect potential hazards on the road. However, other senses like hearing, touch, and smell also play a crucial role in driving. For example, we use our sense of hearing to listen for sirens or horns and our sense of touch to feel the vibration of the car or the steering wheel. Although these senses provide additional clues to help us drive safely, they are not as dominant as our vision. Therefore, it's important to maintain good eye health and get regular eye exams to ensure that we have the best possible vision while driving.

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In an active low pass filter, the voltage gain Vout/Vin falls off at a slope of -20dB/decade, as the frequency of the input signal increases. The corner frequency is the frequency at which the voltage gain falls by 3dB or to 70.7% of its maximum value. The signal ratio Vout/Vin at the corner frequency of the filter is 0.707 or -3dB.

An active low pass filter is a type of electronic filter that allows low-frequency signals to pass through, while attenuating high-frequency signals. An active low pass filter, unlike a passive low pass filter, employs an active component such as an amplifier or an op-amp. The input signal is amplified in an active low pass filter, with the output signal being the input signal that has been filtered.The gain of the amplifier decreases at the rate of -20dB/decade as the frequency of the input signal rises, owing to the presence of a capacitor in the feedback loop of the amplifier. The filter's output is 180 degrees out of phase with the input signal since the capacitor leads to a phase shift between the input and output signals. This is referred to as phase shift, and it is a characteristic of all filters that employ capacitors.A capacitor is employed to bypass high-frequency signals to ground in a low pass filter. This capacitor forms a low impedance path to ground for high-frequency signals, while the resistor and feedback network have a high impedance for high-frequency signals. This creates a high-frequency attenuation in the filter, allowing only low-frequency signals to pass through.

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A Poisson process is a statistical model that describes the occurrence of rare events over time or space. It is commonly used to model the number of failures in commercial water pipes.

One of the advantages of using a Poisson process to model the number of failures in commercial water pipes is that it allows for the calculation of the probability of multiple failures occurring within a given time period. For example, if the failure rate is estimated to be 1 failure per 100 km of pipe per day, the probability of two failures occurring in a 24 hour period can be calculated.

In addition, the Poisson process can be used to determine the expected number of failures over a given time period. For example, if the failure rate is estimated to be 1 failure per 100 km of pipe per day, the expected number of failures over a 30-day period would be 30 failures.


In conclusion, the Poisson process is a useful statistical model for estimating the number of failures in commercial water pipes. It allows for the calculation of the probability of multiple failures occurring within a given time period, as well as the expected number of failures over a given time period. However, it is important to consider the assumptions of the model and to be aware of potential sources of variation in the rate of failures over time.

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An example of surveillance would be mounting a GPS locator on a motorcycle in a parking area where there is a history of stolen motorcycles.

Hence, An example of surveillance would be mounting a GPS locator on a motorcycle in a parking area where there is a history of stolen motorcycles.

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True. The magnitude and polarity of the voltage across a current source are not dependent on the network to which it is connected.

When a current source is connected to a network, it supplies a constant current regardless of the voltage across it. This means that the voltage across the current source is not influenced by the network itself. The magnitude of the current remains unchanged regardless of the voltage conditions in the network. Similarly, the polarity of the voltage across the current source is fixed and determined by the direction of the current flow, regardless of the network configuration. Therefore, the voltage across a current source is independent of the network and remains constant as long as the current source is providing the specified current.

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The correct answer is "cipher" text. Encryption involves transforming plain text into cipher text using cryptographic algorithms and techniques to protect the confidentiality and integrity of the message.

Encryption is a fundamental concept in cryptography, which is the practice of secure communication. It involves transforming plain text, which is the original message that is readable and understandable, into cipher text, which is the encrypted version of the message that is not easily readable or understandable without the appropriate decryption key.

The process of encryption uses cryptographic algorithms and keys to perform the transformation. The algorithms define the specific mathematical operations and transformations applied to the plain text to produce the cipher text. The keys, which are typically secret and known only to the authorized parties involved, determine the specific parameters and configurations used by the encryption algorithm.

The purpose of encryption is to ensure confidentiality and privacy of sensitive information. By converting the plain text into cipher text, unauthorized individuals or attackers who intercept or gain access to the encrypted message cannot easily understand its contents. Encryption helps protect data from unauthorized disclosure and maintain the secrecy and integrity of the information being transmitted or stored.

To decrypt the cipher text and retrieve the original plain text, the authorized recipient or user must possess the appropriate decryption key or keys, which allow the reversal of the encryption process. Decryption involves applying the reverse transformations specified by the encryption algorithm using the correct key, resulting in the retrieval of the original plain text.

Overall, encryption plays a vital role in various areas, such as secure communication over networks, data protection in storage systems, safeguarding sensitive information, and ensuring the security of transactions and online interactions. It provides a powerful tool for maintaining confidentiality and securing data in today's digital world.

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A(n) palm switch is used in factory environments as an emergency or contact switch when a worker is using both hands for assembling a product. Palm switches are manually activated control devices designed to prevent unintentional machine operation.

It is a safety device used to ensure that machinery operates only when all safety guards are in place, to prevent personnel from accidentally putting their hands into dangerous machinery. The safety palm switch, like other kinds of emergency stops, must be placed in a location that can be reached quickly and easily in an emergency situation.Palm switches are utilized in assembly operations to decrease the likelihood of accidental machine operation. Palm switches are devices that are designed to be activated only when the operator is physically in contact with the switch. The operator must press and hold the button with his or her palms to start the device's operation, and then release the button to stop it. They are usually installed in areas where hand access to the device is necessary for the assembly process.

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On a 15-foot boat, it is typically required to have a U.S. Coast Guard-approved personal flotation device (PFD) or life jacket on board for each person.

The exact regulations may vary depending on the jurisdiction and local laws, but ensuring the availability of an appropriate PFD for every individual on the boat is a common safety requirement.

The PFDs should be of the appropriate size and type for each person, and they should be in good condition and readily accessible in case of an emergency. It is essential to follow the specific regulations and guidelines provided by the relevant maritime authority in your area to ensure compliance and promote boating safety.

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Complete Question

Analyze the boundary work done during the process having a rigid tank contains air at 500 kPa and 150°C. As a result of heat transfer to the surroundings, the temperature and pressure inside the tank drop to 65°C and 400 kPa, respectively.

Determine the boundary work done during this process and heat Lose

Answer:

a)  \(W=0\)

b)  \(dQ=-61.03KJ/kg\)

Explanation:

From the question we are told that:

Pressure of air \(P_1=500kpa\)

Temperature of Air \(T_2=150°C\)

Pressure drop \(P_2=400kpa\)

Temperature of drop \(T_2=65 \textdegree C\)

Generally the Constant Volume Process  is mathematically given by

 \(V_1=V_2=V\)

Therefore

a)

Generally the equation for  boundary work w is mathematically given by

 \(W=pdv\)

 \(W=P(V_2-V_1)\)

 \(W=P(V_V)\)

 \(W=0KJ\)

b)

Generally the equation for Heat Change is mathematically given by

 \(dQ=dU+dW\)

 \(dQ=dU\)

 \(dQ=C_v(T_2-T_1)\)

Where

   C_v=Specific Heat capacity of Air

  \(C_v=0.718 kJ/kg K\)

 \(dQ=0.718(338-423)\)

 \(dQ=-61.03KJ/kg\)

Answer: Individuals certified in CPR, this includes EMS an dbystanders thet know how to do CPR

Only the individuals that are certified in CPR should perform CPR on accident victims.

Cardiopulmonary resuscitation (CPR) is performed when a person stops breathing. CPR is done in order to save the live of the person and this should be down by someone whom is trained.

In this case, someone who is certified in CPR such as a doctor etc should be the one that will perform the CPR.

In conclusion, the correct option is "individuals certified in CPR".

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