Since technician A said that the state of charge of a NiMH battery can be determined by measuring cell voltage, the technician that is correct is: B) Technician B.
What is a charge?In Science, a charge can be defined as a fundamental, physical property of matter that governs how the particles of a substance are affected by an electromagnetic field, especially due to the presence of an electrostatic force (F).
What is a NiMH battery?NiMH battery is the short abbreviation for Nickel-metal hydride battery and it can be defined as a type of rechargeable battery which is typically used in electronic devices such as the following:
Laptop computers.Mobile phones.Camcorders or digital cameras.Generally speaking, there are several factors that must be considered in order to determine the state of charge of a Nickel-metal hydride (NiMH) battery and these include the following:
TemperatureOutput currentCell voltageIn this context, we can logically deduce that only Technician B is correct.
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Complete Question:
Technician A says that the state of charge of a NiMH battery can be determined by measuring cell voltage. Technician B says that many factors should be considered in determining the state of charge of a NiMH battery, including temperature, output current, and cell voltage. Which technician is correct?
A) Technician A
B) Technician B
C) Both Technicians
D) Neither Technician
a 1/40 airplane model is tested in a wind tunnel at full velocity and temperature. what is the approximate ratio of wind tunnel pressure to normal ambient pressure?
In wind tunnel tests, low-pressure differential readings in the range of 1.0-120 Pa, spanning speeds of 3 to 10 m/s at angles of attack of 20 to +25, were fully functional.
How is wind pressure determined?To calculate the wind pressure on a structure, use the formula below: q = K x V2 = coefficient of exposure x fundamental wind speed c fundamental wind speed. Although the train moves a lot of air, it cannot escape the tunnel quickly enough. Pressure increases as a result. Commonly used to express pressure readings is the unit of psi, which can be either imperial or English. It stands for pounds per square inch and is equivalent to about 6890 Pascals. The speed of the wind and atmospheric pressure are closely correlated. The pressure gradient is steeper and the wind speed is larger the bigger the difference in air pressure between the two places. slower is the pressure gradient the softer
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technician a says that if a pull occurs sometimes to the left and sometimes to the right, this is called memory steer. technician b says that if a vehicle pulls to one side only during acceleration, this is called torque steer. which technician is correct?
The correct answer is technician B says that if a vehicle pulls to one side only during acceleration then this is called torque steer.
Torque steer happens mostly in FWD cars and refers to a situation when a car's engine torque influences its steering. When the driver accelerates quickly, the car's drive wheels, which also happen to be its steering wheels, can tug or veer to either side.Torque steer can be caused by a number of things including a variance of traction between the two drive wheels. Tread or even tyre pressure can impact on the car's ability to pull away in a straight line. The most common cause in front wheel drive cars is a transversely mounted engine.
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Answer:
Tech B only
Explanation:
Memory steer is what happens if you torque down your wheels when they aren't in the straight ahead position, they will want to steer in that direction.
Torque steer is the car pulling to one side during acceleration, this only happens in Front Wheel Drive Vehicles
2. explain how a pulse-width modulation signal controls the speed of a motor when applied to an h-bridge.
You apply a Pulse Width Modulation (PWM) signal to the Enable line to regulate the motor's speed. The motor will operate more slowly the narrower the pulse width.
How does PWM impact the speed of the motor?The motor will run at a speed that is halfway between zero and full speed if the electricity is turned on and off quickly enough. A p.w.m. controller turns on the motor by pulse-by-pulse, and this is exactly what it does. Pulse Width Modulation is the term for the process of varying (modulating) the pulse width in order to control the motor speed.The power supply is quickly turned on and off by a PWM signal to drive a motor. In most cases, this can be accomplished by delivering a PWM signal to a transistor, which will then alter the device's power source. The motor speed can be adjusted by adjusting the PWM signal's pulsewidth.To learn more about PWM signal refer to:
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Describe the refrigeration cycle & how it transfers heat, including all the components & lines. be sure to discuss why the refrigerant is a liquid or vapor and why it is cold or hot.
Heat can be diverted away from the area you want to cool using the refrigeration cycle, also known as a heat pump cycle. This is done by repeatedly compressing and expanding the working refrigerant (air, water, synthetic refrigerants, etc.) to change its pressure.
What is the cycle of a heat pump?In order to heat the air within a building, a heat pump warms the air outside by drawing heat from it and adding it to it. The following procedure is used to achieve this: A gas is created when liquid refrigerant absorbs heat from the ambient air in the "evaporator."The pressure buildup from the compressor raises the temperature of the refrigerant, just like it does with everything that is put under pressure. The refrigerant is a heated vapor, ranging in temperature from 120° to 140°F, when it exits the compressor.The chemical refrigerant, once transformed from a gas to a liquid state, has a remarkable capacity to absorb heat. The heat inside your house might be absorbed and released outside when the refrigerant undergoes a state shift as a result of compression and pressurization.To learn more about Compressor refer to:
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In a series circuit with two identical loads the voltage across each load will be.
In a series connection with identical loads, the voltage would be the same throughout each demand.
When all of the loads are linked in a row, the circuit is said to be in series. One route alone can carry electricity. The left lights in this circuit would be out if one of the flashbulbs were missing. The voltage across the circuit in a series connection is the sum of the individual voltage drops across each component, while the current flows at a constant rate. A series circuit has a voltage equal to the sum of all individual voltage drops. In a series circuit, the voltage across the circuit and the current flowing through each component are both the same.
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an inventor claims to have developed a refrigerator that maintains the refrigerated space at 40f while operating in a room where the temperature is 80f and that has a cop of 13.5. is this claim reasonable?
The claim made by inventor is invalid. A fridge set to 37° F will keep food fresh for as long as possible, preventing the growth of bacteria in raw meats or ice crystals on greens.
In the freezer, keeping food completely frozen requires a temperature of 0°F. The Food and Drug Administration states that 40 degrees Fahrenheit or lower is the recommended refrigerator temperature (FDA). Salmonella, E. coli, and listeria, three bacteria that can result in foodborne diseases, cannot grow at these temperatures. The primary portion of the refrigerator should be no warmer than 40 degrees Fahrenheit. 37 degrees Fahrenheit is the ideal temperature for keeping food cold. Install a thermometer inside your refrigerator if you're unsure of the ideal temperature for one.
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when a thermometer manufacture combines glass tubing, mercury, red dye, paint, plastic, and metal to make thermometers, it is an example of:
When a thermometer manufacture combines glass tubing, mercury, red dye, paint, plastic, and metal to make thermometers, it is an example of Production.
What is thermometer?
Devices that measure temperature or a temperature gradient are known as thermometers (the degree to which an object is hot or cold). Two crucial components make up a thermometer: a temperature sensor that changes in response to changes in temperature, such as the bulb of a mercury-in-glass thermometer or the pyrometric sensor in an infrared thermometer; and a way to translate this change into the a numerical value (For instance, the digital readout on an infrared thermometer or the visible scale that is marked on the a mercury-in-glass thermometer.). In technology and industry, as well as in meteorology, medicine, and scientific research, thermometers are frequently used to monitor processes.
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which method of foam application involves applying a foam stream onto an object and allowing the foam to run down the object onto the surface of the fuel?
Applying foam is yet another component of the overall foam strategy that, if not completed... The nozzle team can then use the Bank-down Method.
What is Bank-down Method ?
Applying foam is another component of the overall foam strategy that, if not done properly, can result in injury and property loss. So far, we've discussed creating a foam setup with the proper nozzles, appliances, and hoselays.
We've talked about the different types of concentrate and the appropriate application rates, as well as expansion ratios and foam drain time. Let's move on to actually applying the finished foam to the spill or fire.
We've said it before in this series, but it's so important that we'll say it again. As with any potential for fire, we should always supply the bare minimum of finished foam.
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Drivers may pass on a two-lane roadway marked with a single solid yellow line on their side of the centerline.
True/False
identify the important principles that are used to achieve the objectives and principles of lean systems. (check all that apply.)
In order to achieve the objectives and principles of lean systems all the given statements are true.
Lean systems refer to an approach to managing an organization with the support of the concept of continuous improvement. It means that lean systems apply a long-term strategy to work that systematically seeks to achieve small, incremental changes in processes so that efficiency and quality can be imporved. The following are the key principles that are used to achieve goals and objectives associated with lean systems:
Precisely specify values for each specific productIdentify the value streams for each productLet the customer pull values from the producerPursue perfectionMake value flows without interruptions"For the complete question, you are referred to below:
identify the important principles that are used to achieve the objectives and principles of lean systems. (check all that apply.)
- Precisely specify value for each specific product.- Identify the value stream for each product.- Let the customer pull value from the producer.- Pursue perfection.- Make value flow without interruptions."
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a combinational logic circuit has two inputs. the values of those two inputs during the past ten cycles were 01, 10, 11, 01, 10, 11, 01, 10, 11, and 01. the values of these two inputs during the current cycle are 10. explain the effect on the current output due to the values of the inputs during the previous ten cycles
A circuit that uses combinational logic has outputs that only depend on the inputs' current states. Each output, in mathematical words, is a function of the inputs.
From the specifications, determine the minimum and maximum input and output quantities. Using their connections to the input, determine the truth table for each of the outputs. For each output, simplify the boolean expression. Use Boolean algebra or Karnaugh maps. A complete adder, which accepts two binary digits as input and outputs a sum bit and a carry bit, is an illustration of a combinational circuit. Many digital devices, such as computers and calculators, employ full adders. A multiplexer is yet another illustration of a combinational circuit.
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regarding the implications of neuroscience for training, which of the following is not true?
A) Learners have to eliminate distractions.
B) Learners need to make their own connections to new ideas.
C) Emotional stimulation should be minimized.
D) None of the answers are correct
Regarding the implications of neuroscience for training, the one that is not true is emotional stimulation should be minimized. The correct option is C.
What is neuroscience?The comprehensive research of the nervous system, its functions, and disorders is known as neuroscience. It is a multidisciplinary science that incorporates physiology, anatomy, molecular biology, developmental biology, and other disciplines.
Neuroscientists study the brain and how it affects behavior and cognitive functions. Neuroscience is concerned with more than just the normal functioning of the nervous system.
One of the misconceptions about the implications of neuroscience for training is that emotional stimulation should be avoided.
Thus, the correct option is C.
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For a simply supported beam with a non-centered point loading, where would the approximate location of the maximum deflection be?
Answers Options:
at the end of the beam length
between the farther support and the load
at the center of the beam
between the closer support and the load
The maximum deflection for a simply supported beam with a non-centered point loading would be at the center of the beam. (option C)
What is the explanation for the above?When the point load is also at the mid-span, the absolute maximum deflection occurs. And it equals P l 3 48 E I. As a result, the distance between point 'P' and the right end for maximum deflection is equal to L/2, i.e. a = L/2.
Typically, support beams are built of wood, steel, or concrete. Among the numerous support, beams are: Cantilever - This beam only has an anchor at one end, leaving the other end unattached and swinging free. This beam is fixed because it is attached on both ends and will not rotate or move at the fulcrum.
The other types of beams are: simply supported beams, overhanging beams, fixed beams, and continuous beams.
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What finite resources may be used in the production of a pair of training shoes?
Answer:
The outsole and upper are glued together during assembly. However, in order to allow the shaft to later be stitched to the welt, the insole is first placed on the shoe and temporarily fastened to the lasts with nails. To give the shoe its final shape, the upper is then lasted and pulled tightly.
Modern shoes are most frequently made of leather, fabrics, synthetic materials, rubber, foam, and plastic. Each has a particular purpose in shoes. Each material can be used in a sneaker, depending on the design. One of the cornerstones of shoe design is the choice of material.
a transformer is connected as a step-down transformer with a 10:1 turns ratio. if the primary voltage is 100 v, what is the voltage of the secondary? question 1 options: vsec
The correct answer is 600v is the voltage of the secondary of a transformer.
A transformer is an electrical apparatus that manipulates the level of voltage flowing through any point in a power grid. In a distribution system, the transformer decreases the voltage traveling through power lines to a level more suitable for residential and commercial use.An electrical device that can change the A.C. current is known as a transformer. Principle – A transformer works on the principle of mutual induction. Mutual induction is the phenomenon by which when the amount of magnetic flux linked with a coil changes, an E.M.F. is induced in the neighboring coil.
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boilers that have water on the outside of the tube in the boiler shell and has the products of combustion inside the tubes is referred to by what name?
Answer: Shell boilers may be defined as those boilers in which the heat transfer surfaces are all contained within a steel shell. Shell boilers may also be referred to as ‘fire tube’ or ‘smoke tube’ boilers because the products of combustion pass through the boiler tubes, which in turn transfer heat to the surrounding boiler water.
a(n) cycle is the complete operating sequence of a water closet, urinal, or similar device or fixture.
According to plumbing regulations, every home must have a minimum of one toilet, one bathroom sink, one bathtub or shower, and one kitchen sink. Fixtures include items like these and a few more things mentioned in this chapter.
When choosing fixtures, consider flow rates, volume, and water usage. Water saving is a major concern of plumbing sustainability. Two key areas for water conservation are shower heads and bathroom faucets. The length of each use determines how much water is actually saved when taking a shower. A handheld shower may have controls that allow the water flow to be turned off while performing specific showering tasks, including lathering.
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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 provided in options A, C, D, and E are correct in relation to a DC motor.
DC motor is an electronic machine that transforms electrical energy into mechanical energy. DC motor functions using direct current. In the context of the DC motor, true statements are given below:
In a DC motor, back or induced emf results from the magnetic force applied by the stator on the charges in the rotor. A DC motor draws a current 'i'. The internal resistance of the DC motor is 'r'. If 'v' is the voltage exerted at the terminals of the motor, back emf epsilon is the difference between 'v' and 'i' 'r'. A DC generator has the same core parts as a DC motor, i.e. rotor, stator, brushes, and commutator. A DC motor converts electrical energy into mechanical energy, and a DC generator converts mechanical energy into electrical energy.However, the following statements are not correct in terms of a DC motor.
Back emf is the useful energy output as a result of the interaction between the stator and the rotor of a motor.The purpose of brushes in a DC motor or generator is to keep the commutator clean of any foreign objects or dirt.You can learn more about DC motor at
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(i) what assumptions about the relationship between the inputs and output are inherent in this specification? do scatter plots support this functional form?
A problem that will be handled by a procedure is described by an input-output specification.
What is input and output specification?An input-output specification outlines the issue that a procedure will try to solve. The input part and the output part are its two components. The input component outlines the kind of data object that should be provided for each actual argument as well as any presumptions that the process might make.A technical specification known as an output specification defines the project scope primarily through performance-based requirements.It is used to assess technical compliance and serves as the technical cornerstone of both the procurement and delivery phases.Known as classical specifications, they outline the precise services to be provided, sometimes in great detail, along with the standard you must meet and the approach you must take to meet the standard.To Learn more About input-output specification Refer To:
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What is the rated power output in kw of a 8-pole motor designed to an iec 180l motor frame? (type in an integer. ).
Answer:
Explanation:
P=11 kW
Explanation:
Given that
Number of poles= 8
I.E.C. 180L motor frame
From data book , for 8 poles motor at 50 Hz
Speed = 730 rpm
Power factor = 0.75
Efficiency at 100 % load= 89.3 %
Efficiency at 50 % load= 89.1 %
Output power = 11 kW
Therefore the rated output power of 8 poles motor will be 11 kW. Thus the answer will be 11 kW.
P=11 kW
what is the average time it takes for one turn of the global conveyor belt? a. 1000-1500 years b. 1-15 years c. 10,000-15,000 years d. none of these choices e. 100-150 years
Option a is correct. The average time it takes for one turn of the global conveyor belt is 1000 - 1500 years.
The ocean is not an expanse of still water. The ocean is like a giant conveyor belt that is constantly in motion. The thermohaline currents (thermo = temperature; haline = salinity) in the deep ocean and the surface-driven currents are what are responsible for this motion. Warm water is less thick and stays on the surface of the ocean whereas cold, salty water sinks to the bottom.
The Norwegian Sea serves as the "start" of the ocean conveyor belt, warming the atmosphere in the chilly northern latitudes with warm water from the Gulf Stream. The water becomes cooler and denser due to the heat loss to the atmosphere, which causes it to sink to the ocean's floor.
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re-write this program so that it searches an array of integers rather than characters. search the integer array nums[8]
A group of comparable data elements in program kept in close proximity to one another in memory is called an array. It is the most basic data structure because each data element can be directly accessed by using only its index number.
What is program?A computer program is a set of instructions, and the term itself can be used both as a verb and a noun. It is used as a verb to describe the act of developing software by using a programming language. An application, program, or application software is a noun used to describe the process of carrying out a particular task on a computer.
An application like Microsoft PowerPoint, for instance, offers a means of producing presentation-related documents. We can browse any website using a browser, which is also an application.
The program that searches an array of integers rather than characters is here:
// This program performs a linear search on a character array
// Insert Name Here
#include <iostream>
using namespace std;
int searchList(int[], int, int); // function prototype
const int SIZE = 8;
int main()
{
int numbers[SIZE] = {3, 6, -19, 5, 5, 0, -2, 99};
int found;
int num;
cout << "Enter a integer to search for:" << endl;
cin >> num;
found = searchList(numbers, SIZE, num);
if (found == -1)
cout << "The number " << num
<< " was not found in the list" << endl;
else
cout << "The number " << num << " is in the " << found + 1
<< " position of the list" << endl;
return 0;
}
//*******************************************************************
// searchList
//
// task: This searches an array for a particular value
// data in: List of values in an array, the number of
// elements in the array, and the value searched for
// in the array
// data returned: Position in the array of the value or -1 if value
// not found
//
//*******************************************************************
int searchList(int List[], int numElems, int value)
{
for (int count = 0; count <= numElems; count++)
{
if (List[count] == value)
// each array entry is checked to see if it contains
// the desired value.
return count;
// if the desired value is found, the array subscript
// count is returned to indicate the location in the array
}
return -1; // if the value is not found, -1 is returned
}
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how fast can you drive around this curve before a steel toolbox slides on the steel bed of the truck?
Answer:
The maximum speed of a truck around this curve before a steel toolbox slides on the steel bed of the truck is 14.832 m/sec.
What is centripetal force?
When a body is accelerated in a close curve a force towards its centers is acting known as centripetal force.
where,
F = centripetal force in N
m = mass in Kg
v = linear velocity in m / s
r = radius in m
According to conditions in order to avoid the slide of the box. The weight of the box must be greater than or equal to the centripetal force acting on the pickup truck.
given,
r = 22 m
g = 10m/s^2
The maximum speed of a truck around this curve before a steel toolbox slides on the steel bed of the truck is 14.832 m/sec.
A truck can travel around this curve at a maximum speed of 14.832 m/sec before a steel toolbox slides onto the truck's steel bed.
What is speed ?Speed is what it means. the speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.
It is the distance that an object moves in a particular direction. It is a way to gauge how far something moves over a specific period of time.
Galileo Galilei, an Italian physicist, is credited with being the first to calculate speed by dividing it by the distance traveled and the time required. Galileo defined speed as the amount of distance traveled in a given amount of time.
Thus, A truck can travel around this curve at a maximum speed of 14.832 m/sec before a steel toolbox slides onto the truck's steel bed.
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An 8-l piston-cylinder device contains air at 300 kpa and 300 k. The air is compressed isothermally to a volume of 2 l. Calculate the work done on air during this compression process.
The work done on air during the compression process is 3.327 KJ in 8l piston-cylinder device contains air at 300 kpa and 300 k.
How to calculate work ?One of the main ways a thermodynamic system interacts with its environment and exchanges energy is through work in thermodynamics. A process that allows the system to spontaneously exert macroscopic forces on its surroundings, or the opposite, facilitates an exchange of energy.
Work is considered to have been completed on a system when a force is applied and the system experiences a displacement. A system is considered to have completed work when it exerts force on an object and results in displacement.
The formula for work is W=Fd
Given that
P1 = 300k pa , V1 = 8L
v2 = 2L
Temperature remains constant it means that this is isothermal process
For isothermal process P1V1 = P2V2
We know that work for isothermal process
W = P1V1 ln P1/P2
Now by putting the values
W = 300 * 8 * 10^-3 ln 2/8
W = -3.327 KJ
Negative sign indicates is process is compression
W=3.327 KJ
Work done on air during this compression process is 3.327 KJ
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4. in a horizontal cross section, raising (increasing the elevation of) the outer edge of a road with respect to inner edge is known as .
Superelevation is a method of constructing infrastructure in roadway curves in which the outer edge of the pavement is raised above the inner edge.
What is Superelevation ?The transverse slope provided to counteract the effect of centrifugal force and reduce the tendency of the vehicle to overturn and skid laterally outwards by raising the pavement outer edge with respect to the inner edge is known as superelevation. " e " represents superelevation.Camber or cross slope = minimum superelevation Camber: A slope that allows rainwater to drain quickly in the transverse direction is known as Camber or Cross slope. This also prevents vehicle slipping and skidding.The radius of the horizontal curve (R) decreases at each horizontal section of a road, causing centrifugal force to increase and act outwards in the horizontal direction on the outer wheel.The transverse slope along the width of the road is provided to generate centripetal force to counteract centrifugal force. It is accomplished by raising the outer edge in a transverse direction with respect to the inner edge for the entire length of the curved section.To learn more about Superelevation refer :
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which of the following is true? a. a radial load is applied when the pressure from the load is perpendicular to the axis of the shaft, whereas an axial load is applied when the pressure from the load is parallel to the axis of the shaft. b. an axial load is applied when the pressure from the load is perpendicular to the axis of the shaft, whereas a radial load is applied when the pressure from the load is parallel to the axis of the shaft. c. both radial and axial loads are applied when the pressure from the load is perpendicular to the axis of the shaft. d. both radial and axial loads are applied when the pressure from the load is parallel to the axis of the shaft.
Option A holds the correct answer. Because the statement given in option A truly reflects the radial load and axial load.
When the load pressure is perpendicular to the axis of the shaft, a radial load is applied and when the load pressure is parallel to the axis of the shaft, an axial load is applied. In other words, the radial load is applied when the pressure from the load is 'perpendicular to the axis of the shaft'. In contrast, the axial load is applied when the pressure from the load is 'parallel to the axis of the shaft'.
However, the rest of the statements are not correct in the context of radial loads and axial loads.
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after an annual inspection has been completed and the aircraft has been returned to service, an appropriate notation should be made
The correct answer is an appropriate notation should be made in the aircraft maintenance records.
Airplane maintenance records include: The total time in service of the airframe and the status of the life-limited parts of the airframe. The time since the last overhaul of the items installed on the aircraft. The indication of the current inspection status of the aircraft, including the time since the last inspection.they serve as a written record of all the maintenance history that has occurred over the life of the aircraft. It also serves as part of the means needed to determine if an aircraft is current on all required maintenance, and if it is in an airworthy condition
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within the mixing zone and thermocline, average temperature and salinity primarily . a. increase with depth. b. remains constant within the mixing zone, but increases within the thermocline. c. remain fairly constant with depth. d. decrease with depth.
Within the mixing zone and thermocline, average temperature and salinity primarily decrease with depth. Thus, option D 'decrease with depth' is the correct answer.
Both the mixing zone and thermocline differ from each other based on temperature. The mixed zone is near the surface where the temperature is roughly that of surface water. While, in the thermocline, the temperature decreases rapidly from the mixed zone temperature to the much colder deep water temperature. Within the thermocline and mixing zone, average temperature and salinity generally decrease with depth.
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Express each of these statements using quantifiers. Then
form the negation of the statement so that no negation is
to the left of a quantifier. Next, express the negation in
simple English. (Do not simply use the phrase “It is not
the case that.”)
a) No one has lost more than one thousand dollars playing the lottery.
b) There is a student in this class who has chatted with
exactly one other student.
c) No student in this class has sent e-mail to exactly two
other students in this class.
d) Some student has solved every exercise in this book.
e) No student has solved at least one exercise in every
section of this book.
The statements which expressing using quantifiers:
a) It is not the case that anyone has lost more than one thousand dollars playing the lottery.
b) It is not the case that there is a student in this class who has chatted with exactly one other student.
c) It is not the case that no student in this class has sent e-mail to exactly two other students in this class.
d) It is not the case that some student has solved every exercise in this book.
e) It is not the case that no student has solved at least one exercise in every section of this book.
What is quantifiers?
Quantifiers are used in quantified expressions to bind the free variables. In other words, quantifiers quantify the variables of the predicates. In predicate logic, there are two well-known quantifiers: the universal quantifier and the existential quantifier. The universal quantifier asserts that statements within its scope are true for every value of the unique variable, whereas the existential quantifier asserts that statements within its scope are true for only some values of the specific variable.
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the first solid phase that form upon cooling of a hypoeutectoid steel (not hypereutectiod) from an austenite phase is called .
The first solid phase that form upon cooling of a hypoeutectoid steel from an austenite phase is called proeutectoid ferrite.
What is proeutectoid ferrite ?When the carbon content of steels is lower than the composition of eutectoid, proeutectoid ferrite may occur (hypoeutectoid steels).Similar to this, proeutectoid cementite commonly develops in steels when the carbon content exceeds that of the eutectoid composition (hypereutectoid steels) A phase that develops below eutectoid composition is proeutectoid ferrite.Ferrite that forms above the lower critical temperature, or the A1 line, in the Iron-Carbon phase diagram is referred to as pro-eutectoid ferrite, while cementite that forms above the eutectoid temperature is referred to as pro-eutectoid cementite. Pro-eutectoid ferrite (see Proeutectoid Ferrite) is created as the steel cools to the eutectoid temperature when steels with less than the eutectoid carbon content are slowly chilled from the austenitizing temperature.To learn more about proeutectoid ferrite refer
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