It will contain two variables: an integer hour and an integer minute.
What is variables?
Variables are symbols or names used in programming to represent data or values that may change over time. Variables can be used to store user input, the result of a calculation, or just about anything else. Variables are like containers for data and are used to store data that can be manipulated and updated as needed. Variables are particularly important in programming because they allow us to store data that can be changed and used in different ways as the program progresses. Variables are also essential to creating dynamic programs that can respond to user input and process data in different ways depending on the situation.
The Clock class is a new class created in the same package as the driver class. This class will live in a separate file and will be used to keep track of the time. It will contain two variables: an integer hour and an integer minute. The Clock class will also contain a constructor that takes two parameters, an integer hour and an integer minute, to initialize the variables. It will also have a method, tick(), that will take no parameters and will increase the time by one minute. Finally, a toString() method will be created to allow the clock to be printed in the format of hh:mm. This class will provide the necessary methods to allow the driver class to keep track of the time, and will allow for easy printing of the time.
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Suppose you have a pre-existing class Pokemon that represents characters in a game, The class has the following data and behavior. Your task is to modify the class to be Comparable by adding an appropriate compare To method. All defensive Pokemon are considered to be "less than" aggressive Pokemon An defensive Pokemon is considered to be "less than" another if it has a lower defense power An aggressive Pokemon is considered to be "less than' another if it has a lower sum of attack and defense power. If two Pokemon are both aggressive or defensive and have the same defense or attack + defense power, they are considered to be "equal " Your method should not modify any Pokemon object's state. You may assume the parameter passed is not null.
The class has the following data and behavior.
public class Pokemon implements Comparable<Pokemon>{
private int defensePower;
private int attackPower;
private boolean isAggressive;
public Pokemon(int defensePower, int attackPower, boolean isAggressive){
this. defensePower = defensePower;
this. attackPower = attackPower;
this. isAggressive = isAggressive;
}
Override
public int compareTo(Pokemon other) {
if (this. isAggressive && !other. isAggressive) {
return 1;
} else if (!this. isAggressive && other. isAggressive) {
return -1;
} else if (this. isAggressive && other. isAggressive) {
return other. attackPower + other. defensePower - this. attackPower - this. defensePower;
} else {
return this. defensePower - other. defensePower;
}
}
}
What is data?
Data is information that is organized and processed in order to be used in decision making, problem solving, and other processes. Data can take many forms, such as numbers, images, words, audio, and video. Data is often collected, stored, and analyzed in order to draw conclusions and make decisions. Data can also be used to track trends, identify patterns, and predict future out comes.
Data can be collected from a variety of sources, including surveys, interviews, observations, and digital devices. Data is an essential component of any organization, and it is used to inform decisions and drive strategies.
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the douglas dc-3 has a maximum velocity of 250 mi/h at an altitude of 7500 ft. each of its two engines provides a maximum of 1200 hp. its weight is 25,000 lb, aspect ratio is 9.14, and wing area is 987 ft2. assume the propeller efficiency is 0.8, and the oswald efficiency factor is 0.7. calculate the zero-lift drag coefficient for the dc-3. the zero-lift drag coefficient for the dc-3 is
The zero-lift drag coefficient for the dc-3 is approximately 0.037.
What is velocity ?
Velocity is the direction at which an object is moving and serves as a measure of the rate at which its position is changing as seen from a specific point of view and as measured by a specific unit of time (for example, 60 km/h northbound). In kinematics, the area of classical mechanics that deals with the motion of bodies, velocity is a fundamental idea.
A physical scalar quantity called velocity must have both a magnitude and a direction in order to be defined. Speed is the scalar absolute value (magnitude) of velocity; it is a coherence derived unit which quantity is measured in metres per second (m/s or m/s1) inside the SI (metric system). In opposed to "5 metres per second east," which is a vector, "5 metres per second," for example, is a scalar.
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which of the following are common non-silicate and building materials? group of answer choices halides fluorides carbonates sulfides
Sulfides, Carbonates and Halides are common non-silicate and building materials.
What is non-silicate minerals?Minerals with no oxygen or silicon (Si) in their tetrahedral structure. They consist of pyrite, calcite, gypsum, flourite, hailte, and hail. Oxides, Sulfides, Halides, and Phosphates are typical mineral groups that are not silicates.
Nonsilicate minerals are those that contain additional elements in addition to silicon or oxygen, but not both. Many of these minerals are taken from the rock by miners and refined into ore minerals or minerals with high metal content.
Other nonsilicates are extracted as industrial minerals and used as crucial components in the production of products like concrete, wallboard, paper, and even some of our foods, medications, and clothing.
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if the old radiator is replaced with a new one that has longer tubes made of the same material and same thickness as those in the old unit, what should the total surface area available for heat exchange be in the new radiator to achieve the necessary heat exchange rate at the recommended temperature gradient?
Considering the facts provided Surface total = 3/2 * radiator's surface area.
What is the process of heat exchange?The rate of heat transfer between two things is related to the temperature difference between them. Internal heat must be moved from the different organs and tissues to the colder body surface for the subsequent thermal loss. Internal heat transport describes the movement of heat from the bodily core to the shell.
Briefing:we will use this relation
[tex]K=\frac{Q d}{A * c h a n g e i n T}[/tex]
change throughout T = ΔT ,
consequently New Area (A) = 3/2 * Old Radiator Area
Considering that the heat conductivity of something like the new and old radiators is the same.
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The complete question is-
The radiator of a car is a type of heat exchanger. Hot fluid coming from the car engine, called the coolant, flows through aluminum radiator tubes of thickness d that release heat to the outside air by conduction. The average temperature gradient between the coolant and the outside air is about 130 K/mm . The term ΔT/d is called the temperature gradient which is the temperature difference ΔT between coolant inside and the air outside per unit thickness of tube.
he douglas dc-3 has a maximum velocity of 200 mi/h at an altitude of 7500 ft. each of its two engines provides a maximum of 1200 hp. its weight is 25,000 lb, aspect ratio is 9.14, and wing area is 987 ft2. assume the propeller efficiency is 0.8, and the oswald efficiency factor is 0.7. calculate the zero-lift drag coefficient for the dc-3.
The zero-lift drag coefficient for the DC-3 is 0.004.
What is coefficient?
When a variable in a single term or even the terms of the a polynomial is multiplied by a constant value, it is known as multiplying, in mathematics, as adding or multiplying by a coefficient. Normally, it is a number, but occasionally a letter inside an expression may be used in its place. X is the variable as well as 'a' and 'b' are the coefficients inside the expression: ax2 + bx + c, for instance. When a number or other quantity is combined with a variable, it is known as a coefficient. Commonly, the variable is multiplied by an integer, which is then written next to it. Without a corresponding number, a coefficient of 1 is assumed for all variables.
The zero-lift drag coefficient (Cd0) can be calculated using the following equation:
Cd0 = 0.004 + (W/qS)*(Cl^2/πAR),
where W is the aircraft weight (25,000 lb), q is the dynamic pressure at 7500 ft (33.7 lb/ft2), S is the wing area (987 ft2), Cl is the lift coefficient at zero lift (0 in this case), and AR is the aspect ratio (9.14).
The dynamic pressure can be calculated using the following equation:
q = (1/2)*ρ*V^2,
where ρ is the air density at 7500 ft (0.0022 slugs/ft3) and V is the aircraft velocity (200 mi/h, which is equivalent to 90 m/s).
Plugging the values into the equation above, the dynamic pressure at 7500 ft is q = 33.7 lb/ft2.
Plugging the values into the equation for Cd0, we get:
Cd0 = 0.004 + (25,000/33.7)*(0^2/π*9.14)
Cd0 = 0.004 + 0
Cd0 = 0.004
Therefore, the zero-lift drag coefficient for the DC-3 is 0.004.
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you have a rectangular workpiece that needs a facing operation plus center drilling, and a universal chuck is mounted on the lathe spindle. what is your procedure to prepare for machining?
The lathe is a very useful tool that is crucial to understand how to use. A cylindrical object is rotated by this machine in opposition to a tool that the user controls.
The lathe is the first machine tool ever created. As the cutting tool is advanced along the intended cut line, the work is retained and rotated on its axis. One of the most useful machine tools in industry is the lathe. The lather can be used for turning, tapering, form turning, screw cutting, facing, dulling, drilling, spinning, grinding, and polishing operations with the right attachments. Cutting operating carried out using a cutting tool that is fed parallel to or at an angle to the work axis.
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using the what-if function in excel to make a decision is considered a type of __________.
Using the what-if function in Excel to make a decision is considered a type of decision support system.
For, this type of system uses analytics techniques such as data mining and predictive analytics to help decision makers identify trends and correlations in their data that they can use to make better decisions.
What is the What-If function in Excel?The What-If function in Excel is a powerful tool that lets you analyze the impact of changing variables in a formula. It allows you to input different values for variables in a formula and see the results for each different set of values.
This is useful for analyzing a variety of scenarios and predicting the effects of changes, helping them make better choices for their business.
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databases are designed to keep data and information about different types of data objects, including objects, events, ______ , and places.
Events, places, people one of the four popular types of systems you can employ to manage your business data is a relational database management system.
What exactly is an object-based database?A database system that can handle complex data objects or objects that resemble those used in object-oriented programming languages, is known as an object-oriented database (OOD). Every element in object-oriented programming (OOP) is an object.
Which locations house database objects?Database objects in DB OptimizerTM are kept in Data Source Explorer as subnodes of specific, relevant databases. A table, view, or another database object may have an alias, which is a different name for it. Different databases include MySQL, SQL Server, MongoDB, Oracle Database, PostgreSQL, Informix, Sybase, and more.
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What are the 4 properties of the genetic code?
The genetic code is crystal clear. Every codon only specifies one amino acid (or start or stop). The genetic code repeats itself. The majority of amino acids are encoded by several codons.
Chromosomes contain genes. A linear array of linked genes is located along chromosomes. Map distances are (approximately) cumulative on a per-person basis. Codons, which are units of three nucleotides, are used to segment this sequence. The four nucleotides included in mRNA — A, U, G, and C — can be combined in a total of 64 distinct ways since codons are three-letter structures. We will go over three main guidelines: A codon's base order must correspond to the direction of translation system, The code doesn't overlap. A fixed reading frame is used to read the code.
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obd-ii regulations require all vehicle manufacturers to use the same names and acronyms for all electric and electronic systems related to the engine and emission control systems
This will make it easier for mechanics, service facilities, and repair facilities
What is mechanics?
Mechanics is a branch of physical science that deals with the study of motion, forces, energy, and their effects on objects. It seeks to explain and predict the behavior of matter and energy in the natural world. Mechanics can be divided into two main categories: classical mechanics and modern mechanics. Classical mechanics involves the study of motion, forces, and energy of macroscopic objects. It is based on the laws of motion, which were first formulated by Isaac Newton in the 17th century. Modern mechanics, also known as quantum mechanics, deals with the behavior of particles at the atomic and subatomic level. It is based on the principles of quantum theory, which was developed in the early 20th century. Mechanics is important to many other fields of science, such as engineering, chemistry, and materials science, and is used to develop and design a wide range of products and technologies.
Yes, all automakers are required to use the same names & acronyms for all electrical and electronic connecting devices to the engines and emissions control systems in accordance with OBD-II standards. This promotes consistency and comprehension among all automaker brands. On Board Diagnostics, or OBD-II, is the second generation or automotive diagnostic devices that is used to track the efficiency of the engines and emissions reduction systems. All automakers must utilize the same names or abbreviations for all electrical and electric systems connected to the engines and emission systems in order to adhere to OBD-II requirements. This will make it easier for mechanics, service facilities, and repair facilities to recognized any issues with the vehicles and make the required repairs.
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For a list of numbers entered by the user and terminated by 0, find the sum of the positive number and the sum of the negative numbers. C++ language only. No points will be given if other languages are used.
The sum of the negative numbers. C++ language only:
#include <iostream>
#include <string>
using namespace std;
int main()
{
int positiveSum =0; //this will hold sum of positive nums
int negativeSum =0; // this will hold sum of negative nums
int number=0; // user input for number
for (int i = 1; i <=10; i++) // loop from 1 to 10 times
{
cout << " Enter a number: ";
cin >> number;
// now check if number is positive or negative
if (number >=0)
{
positiveSum += number; // adds this number to positiveSum
}
else if (number < 0)
{
negativeSum += number; // adds this number to negativeSum
}
}
cout << endl;
cout << " Total of Positive numbers is: " << positiveSum << endl;
cout << " Total of Negative numbers is: " << negativeSum << endl;
cout << " Total of all numbers is: " << totalSum << endl;
return 0;
}
What is an increment operator in C++?
Increment Operator is used to increasing the value of the operand by 1 whereas the Decrement Operator is used to decrease the value of the operand by 1. In C++, the value of the variable is increased or decreased by 1 with the help of the Increment operator and the Decrement Operator.
How to use i ++ in C++?
In C/C++, Increment operators are used to increasing the value of a variable by 1. This operator is represented by the ++ symbol. The increment operator can either increase the value of the variable by 1 before assigning it to the variable or can increase the value of the variable by 1 after assigning the variable.
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1. it has been noted that heat transfer in gas-metal arc welding is higher than in shielded-metal arc welding. explain why this would be the case. which process would lead to more heat-affected zone cracking in hardened steels?
The temperatures are lower and the gas-metal arc welding method is simpler to manage than shielded-metal arc welding. Porosity that hinders heat transfer is produced by the higher heat in shielded metal arc welding.
With an externally supplied gaseous shield of inert gas such as argon and/or helium, gas metal arc welding (GMAW) creates an arc between a consumable metal electrode and the work piece as the source of heat. In the shielded metal arc welding (SMAW) process, heat from an electric arc that is maintained between the tip of a consumable electrode and the surface of the base material in the joint being welded results in the coalescence of metals.
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machine learning is the field of study that gives computers the ability to learn without being explicitly programmed. which of the following are categories of machine learning? check all that apply
The categories of machine learning include the following:
A. supervised
B. unsupervised
C. reinforced
What is machine learning (ML)?In Computer technology, machine learning (ML) is also referred to as deep learning or artificial intelligence (AI) and it can be defined as a subfield in computer science which is typically focused on the use of data-driven techniques (methods), computer algorithms, and technologies to develop a smart computer-controlled robot with an ability to automatically perform and manage tasks that are exclusively meant for humans or solved by using human intelligence.
Generally speaking, machine learning models are designed and developed to accept numerical data (numbers) or collections of numerical data (numbers) as an input, which may either be supervised or unsupervised.
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Complete Question:
Machine learning is the field of study that gives computers the ability to learn without being explicitly programmed. Which of the following are categories of machine learning?
supervised
unsupervised
reinforced
regression
How many wires can be broken in a wire rope sling?
Five broken wires in one strand or ten broken wires spread at random were laid in a rope.
If the total number of visible broken wires in any length of eight diameters exceeds 10% of the total number of wires, or if the rope exhibits other symptoms of excessive wear, corrosion, or defect, the rope may not be utilised for the vessel's cargo gear. Special attention must be paid to the condition of wire rope portions that are close to terminal connections, are subject to anomalous wear, and are not typically exposed for inspection.
Any eye splice in a wire rope must have two tucks with one-half of the wires cut out of each strand and at least three tucks with the whole strand of rope.
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A 2-dimensional 3x3 array of ints, has been created and assigned to tictactoe. Write an expression whose value is true if the elements of any row or column or diagonal are equal.
This is my current java code, and I'm definitely missing something, any help would be appreciated:
tictactoe[0][0] == tictactoe[0][1] && tictactoe[0][0] == tictactoe[0][2] || tictactoe[0][0] == tictactoe[1][0] && tictactoe[1][0] == tictactoe[2][0] || tictactoe[0][2] == tictactoe[1][1] && tictactoe[0][2] == tictactoe[2][0];
Answer:it looks complete d to me
Explanation:
it looks like you have all of it
at the operating point, the duty ratio of the power converter is 50% and provides a 25v output voltage. for a sinusoidal duty ratio variation of
The output voltage ranges from 23.75V to 26.25V at its lowest and highest points, respectively.
Voltage: What is it?
When charged electrons (current) are forced through a conducting loop by the force of an electric circuit's power source, they can perform tasks like illuminating a lamp. Voltage equals pressure and is expressed in volts (V). The name celebrates Alessandro Volta (1745–1827), an Italian physicist who developed the voltaic pile, the precursor of the household battery. Early on, voltage was known to as electromotive force (emf). This is the reason why the letter E is used to denote voltage in formulas like Ohm's Law.
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technician a says higher aspect ratios provide a softer ride because they will deflect more over irregular surfaces and under heavy loads. technician b says shorter sidewall heights demand stiffer sidewalls. therefore, tires with a low aspect ratio have a harsher ride. who is correct?
Both technicians gave the correct statement. The higher aspect ratio provides a smoother ride as it will turn more on uneven surfaces and under heavy loads and the shorter sidewall height demands stiffer sidewalls.
Technician is someone who masters and understands a certain field of technology. A mechanic is the first person to contact when a breakdown occurs to be analyzed and repaired. Not only that, but he is also responsible for carrying out routine inspections and maintenance. Literally technicians or technicians are "oil" that keeps technological systems, such as machines, running.
One of the professions related to the field of technicians is machine alias engineering. This type of work is commonly found in the fields of transportation, industry, electricity, and factory machinery. Based on its diversity, mechanical work has a wide scope in many industrial fields. In general, this profession is in an entry-level position. There are many specialization options in this job, ranging from mechanical mechanics, electrical mechanics, to industrial mechanics.
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technician a says if caster at both wheels is not equal, the vehicle will tend to drift toward the side with the most positive caster. technician b says if camber is not the same on both wheels, the vehicle will pull toward the side with the most positive camber. who is correct?
Technician B says if the camber is unequal on the two wheels, the vehicle will tow to the side with the most positive camber. the statement expressed by the technician is true.
Camber is an automotive term for the slope of a car tire. protruding tires; when it comes out at the bottom it is called negative camber while for the protruding part of the top it is called positive camber. So what is often found on the streets is negative camber modification.
There are various purposes for camber modifications in cars, including racing cars such as the Naskar which use turning and tilting tracks at high speed. The use of negative camber in this racing event to get stability. Meanwhile, in touring cars, positive camber is used to lighten the steering load. What is clear is that this modification is not arbitrary.
However, currently the application of camber modifications does not pay attention to functional purposes but rather to trends or appearances. Because of that, it is better if you are going to make changes to a vehicle so that it becomes non-standard, you should pay attention to various factors including comfort and safety.
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A process that exhibits random variability would be judged to be out of control. True or false?
A process that exhibits random variability would be judged to be out of control; it reflects a false statement.
In the production process, random variability refers to the variations in the output of a process, generated by countless factors such as slight variations in raw materials, vibration in machines, and variability in taking measurements. When a production process seems to exhibit random variability it is not judged to be out of control.
Therefore in concluding remarks, a production process that shows random variability would not be considered out of control".
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Water Power Corporation wants to begin operations that include the discharge of waste into navigable waters. Under the Clean Water Act, the company must install certain equipment
a. with all deliberate speed after beginning operations.
b. before beginning operations.
c. only on a voluntary basis.
d. only if a regulatory agency challenges the discharge.
The Clean Water Act (CWA) is the primary federal law in the United States governing water pollution. It requires the installation of certain equipment before beginning operations that involve the discharge of waste into navigable waters. This equipment is designed to reduce the amount of pollutants released into the environment, and to ensure that any discharge meets the standards established by the CWA. The CWA requires that the installation of such equipment happen before beginning operations, and that the equipment be maintained and operated according to the standards established by the CWA. This is to ensure that the discharge of pollutants into navigable waters is minimized, and that the discharge meets the required standards. The CWA also sets out requirements to ensure that any changes to the equipment or to the discharge of pollutants are regulated, and that any violations of the CWA are reported.
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Using the what-if function in excel to make a decicion is considered a type of __________.
Using the what-if function in Excel to make a decision is considered a type of forecast and scenario model
What is excel?Excel is Microsoft's spreadsheet program and is part of the Office family of business application products. Microsoft Excel allows users to format, organize, and calculate data in spreadsheets.
Using software such as Excel to organize data makes it easier for data analysts and other users to view information when data is added or changed. Excel contains numerous fields called cells arranged in rows and columns. Data is placed in these cells. Excel is part of the Microsoft Office and Office 365 suites and is compatible with other applications in the Office suite. Spreadsheet software is available for Windows, macOS, Android, and iOS platforms.
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What particles carry electric current in metal wires?
A. amperes
B. protons
C. electrons
D. neutrons
Electric current in metal wires is carried by free electrons. due to any variations.
Electrical charge travels through a conductor when a potential difference is put across it, and electrical current is a measure of how much electrical charge passes through a conductor in a given amount of time.
Electrons and protons are both present in an atom in equal numbers. So, in general, atoms are electrically neutral. There will be an attractive force acting between the electrons and protons because they are attracted to one another due to the positive charges of the core nucleus's protons and the negative charges of the circling electrons. A variety of electrons organise themselves in distinct circling shells that are spaced apart from the nucleus in an atom.
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Petra is working on a project with a team of engineers. She checks in with each team member and discusses what progress they are making, talks about challenges they face, and helps resolve any conflict issues that arise. What role is Petra playing on this team?
Petra is working on a project with a team of engineers. She checks in with each team member and discusses what progress they are making, talks about challenges they face, and helps resolve any conflict issues that arise.
The role Petra is playing in the team is of a Head manager.
Who are engineers?A professional involved in the creation, design, and upkeep of numerous devices, buildings, and information systems is known as an engineer. Observing the budget and timeline requirements set forth by their employer is another duty of engineers. Continually innovating and creating, engineers are experts in their fields.
For the creation of novel goods, services, technologies, and procedures, engineers are in charge. This is a broad career that prospective engineers can explore because they can work in a variety of fields. Choosing whether engineering is a good fit for your interests and abilities can be aided by being aware of the scope of the field.
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for the following pairs of alloys that are coupled in seawater, predict the possibility of corrosion. if they are likely to corrode, which metal/alloy will corrode. (a) aluminum and cast iron (b) inconel and nickel (passive) (c) cadmium and zinc (d) brass and titanium (e) steel and copper
The pairs of alloys that are coupled in seawater, predict the possibility of corrosion. If they are likely to corrode, kind of metal/alloy will corrode is (b) inconel and nickel (passive). Corrosion is happened when metal, stone, or other materials are corroding.
Corrosions are generally happened while most or all of the atoms on the similar metal surface are oxidized, damaging the entire surface. Most metals are easily oxidized: they tend to lose electrons to oxygen (and other substances) in the air or in water. As oxygen is reduced (gains electrons), it shapes an oxide with the metal.
There are type of corrosion:
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if the old radiator is replaced with a new one that has longer tubes made of the same material and same thickness as those in the old unit, what should the total surface area available for heat exchange be in the new radiator to achieve the necessary heat exchange rate at the recommended temperature gradient?
First of all, we need to find the total surface area of the old radiator which is; 3/2* area of old radiator.
From the question that we have been given,
We can say that the Thermal conductivity is the same for both radiators.
We can use the following formula to get the surface area of the new radiator;
K = Q/A*ΔT
change in T = ΔT
So, we can say the surface area for the new radiator is 3/2* area of the old radiator.
A heat exchanger
This is a heat transfer device, usually used to in transferring heat from one source to another and eventually to a working fluid. This heat exchangers are very vital in the cooling and heating processes. The fluids can be separated to avoid mixing. They are normally in many places such as, refrigeration, space heating, power plants etc.
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the __________ method is a framework for operationalizing a firm’s strategic plan by focusing on measurable outcomes based on dimensions of a firm’s performance.
By concentrating on quantifiable results based on aspects of a firm's performance, the balanced scorecard technique offers a framework for integrating a firm's strategic strategy.
A framework and an example are what?Therefore, a framework is a collection of resources and pieces that may be applied to several applications. The Microsoft. NET Framework is one of the more very well popular frameworks for websites.
What is the framework concept?One or maybe more formal theories, in whole or in part, along with additional ideas and actual data from the literature are all included in a conceptual framework. It is employed to demonstrate the connections between these concepts and how their relate towards the research topic.
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a florida professional engineer, who is an independent consultant, prepares the design and drawings for prefabricated wood trusses for the roof of a structure pursuant to the engineering requirements prescribe by the engineer of record. the p.e. for the roof trusses is known as:
An engineer who is an independent consultant, preparing designs and drawings for prefabricated timber trusses for roof structures according to the engineering requirements specified by the record engineer is called a delegated engineer. This delegated engineer has an important role in the creation of a building design.
Many types of engineers are currently developing, some of which are civil, structural, mechanical, electrical, chemical, environmental, systems, materials, computer engineers, and so on. However, broadly speaking, the engineer's job is to cover the three things below.
Creating new technologyIn a world that is constantly changing, the first job of an engineer is to invent new technologies to solve various problems.
Social responsibilityThe second duty of an engineer is to be responsible for social issues, such as the distribution of wealth, opportunity and privilege in a society.
Develop new solutionsThe third task of an engineer is to develop new solutions. Engineers are tasked with researching the problem and can then develop a new prototype.
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a bus travels at 85 km/hr in standard air. the frontal area of the vehicle is 7.2 m2, and the drag coefficient is 0.95. calculate the drag force on the vehicle. how much power is required to overcome the aerodynamic drag?
Frontal region A may be calculated by multiplying the width and height of a rectangle that encircles the front of an automobile by 0.85 to get a rough idea of the frontal projection of the area of the car.
When looking at the car from a direction normal to the front grills, you will see this area. The coefficient used to calculate resistance as an object moves through a fluid is called the drag coefficient and is represented by the letter Cd. Because the coefficient of drag has no dimensions, it can be used to calculate aerodynamic drag as well as the effects of form, tilt, and flow conditions. A drag coefficient can be used to express how the drag force and an object's motion are related.
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within the reactor, the stationary rods are the fuel rods and contain the fuel. the rods that move up and down are the control rods. what do the little dots that move between the fuel rods represent?
The little dots that move between the fuel rods represent steam.
What are fuel rods?
A long, thin zirconium metal tube that holds pellets of fuel for nuclear reactors made of fissionable material. The fuel rods are bundled together into fuel assemblies, which are then put one at a time into the reactor core. The fuel rod's main functions are to maintain the fuel in a precise geometry and to act as the first line of defense between the fission products and the outside world. Therefore, maintaining its integrity is the main objective of fuel design and operating procedures for reactors. Small ceramic pellets of low-enriched uranium oxide are the fuel used in today's commercial reactors. These fuel rods are bundled into tall fuel assemblies, which are then put inside the reactor.
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A storage tank for concentrated nitric acid will be constructed from aluminum to resist corrosion. The tank is to have an inside diameter of 6 m and a height of 17 m. The maximum liquid level in the tank will be at 16 m. Estimate the plate thickness required at the base of the tank. Take the allowable design stress for aluminum as 90 /^2.
Answer: P = ρ x g x H
Explanation:Where
ρ = density of water = 1000kg/m³
H = Height of the tank = 10m
g = acceleration due to gravity = 9.81m/s²
Substituting these values into ----- Eqn 1 gives
P = 9.81 x 10⁴Pa
Now for cylindrical shaped vessel,
The Longitudinal stress σ1 = P x r / 2 x t
where t= tank thickness = 10mm = 0.01m
r = tank radius = 2m
substituting these values into eqn2 gives
σ1 = 9.8 x 10⁶Pa
But from the mohr's circle stress analysis, we have
The maximum normal stress σm = σ1m = 2 x 9.8 x 10⁶Pa = 19.6MPa
The maximum shear stress σ1s = 9.8 x 10⁶Pa = 9.8Mpa