This is Java Assignment. Add screenshot of execution. Please follow the instruction. And I need answer asap.
Design a class named Person and its two subclasses named Student and Employee. Make Faculty and Staff subclasses of Employee. A person has the following attributes: name, address, phone number, and email address. A student has: class year (freshman, sophomore, junior, or senior) and major. An employee has: office (room number) and salary. A faculty member has: department the faculty belongs to and rank (assistant, associate, or full). A staff member has: role the staff member plays. Override the toString method in each class to have it return an appropriate value.
Make sure you use the following appropriately:
Visibility control: private, protected, and public for each field and method. Remember that you should not make every field protected blindly, right?
super for both constructor and other methods such as toString.
Write a test program (e.g., main in UsePerson.java) that creates an instance of each of the classes: Person, Student, Employee, Faculty, and Staff, and invokes at least their toString methods. Be sure to use subtyping as much as possible.
This time, create an array of a certain type. I say "of a certain type" because I don't want to specify exactly what that type should be. What type you use would depend on what you want to do with the array. For example, you can do one of the following or something else that you come up with:
Create an array of any of these classes and change the name in each object. If that is the case, you will want to make that type Person.
Create an array of an appropriate type and be able to give a 10% raise to each object in the array. In that case you would create an array of the type Employee and populate the array with Employeeobjects, Faculty objects, Staff objects. Then, go through the array and give a raise.
This time, add the usual: equals and compareTo if they make sense to be added. Make sure you did not add a getter and setter blindly for each field. You should add one of these only if it makes sense to add for each field.
This time, go back to each class and add at least one more attribute (field) to each class, and make appropriate changes in the subclasses to cope with the new attribute being added. I am guessing that you can come up with a field that makes sense to be added to each class. If you are absolutely sure that there is no way another field can be added to a class, so be it.
If you like, add two more classes: UndergradStudent and GradStudent as subclasses of Student and revise your program appropriately to deal with these additional classes. This part is not required, but you are strongly encouraged to try it.
Answers
The assignment involves designing a class hierarchy in Java with a base class called Person and two subclasses named Student and Employee.
Further subclasses, Faculty and Staff, are created for the Employee class. Each class has specific attributes and methods defined, including overriding the toString method. The Person class has attributes such as name, address, phone number, and email address. The Student class adds attributes like a class year and major. The Employee class adds attributes for office and salary, while the Faculty subclass introduces department and rank attributes. Lastly, the Staff subclass includes a role attribute. A test program should be written to create instances of each class and invoke their respective toString methods. Subtyping should be utilized whenever possible. Additionally, an array should be created to perform specific operations, such as changing the name for each object or giving a 10% raise to the employees in the array. Furthermore, the assignment suggests implementing equals and compareTo methods where appropriate. Fields should only have getters and setters if they make sense, and additional attributes can be added to each class as necessary.
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Related Questions
Identify the branch of study each student should pursue.
Answers
Answer:
Explanation:
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A resonant circuit has a peak output voltage of 4.5 mV. What is the voltage at the upper and lower cutoff frequency
Answers
Answer:
3.2 mV
Explanation:
The cutoff frequency is the frequency at which the circuit power output is half the peak value. That means the voltage is (√2/2) times the peak voltage:
(√2/2)(4.5 mV) ≈ 3.2 mV
What does efficiency measure?
Answers
Answer:
Efficiency is defined as any performance that uses the fewest number of inputs to produce the greatest number of outputs. Simply put, you're efficient if you get more out of less.
Explanation:
A student is investigating the particles in a glass window, raindrops on the window, and the air around the window. Assume the window, the raindrops, and the air are all at 25 °C.
Answers
Matter can be defined as anything (physical object or body) that has mass and takes up space. Thus, the mass of a physical object measures the amount of matter the object contains.
The states of matter.In Science, water is an example of matter and it exists in three (3) main states or phases such as the following:
SolidLiquidGasBased on scientific records and information, we know that all particles have various degrees of attraction to one another and this can be described as follows:
The glass is a solid and as such the attraction between its particles is strong enough to make them locked in one place. The raindrop is a liquid and as such the attraction between its particles is strong enough to hold them together, but not strong enough to prevent the particles from sliding past each other. The air is a gas and as such there is very little (minimal) attraction between its particles, thereby, making them to move freely.Read more on matter here: https://brainly.com/question/24783543
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Complete Question:
A student is investigating the particles in a glass window, raindrops on the window, and the air around the window. Assume the window, raindrops, and the air are all at 25 degrees Celsius. Identify the particle structure in each sample of matter.
One of the principles of supply chain strategy
Answers
The principle of supply chain strategy is Segregate customers on the basis of service needs of different groups and follow the supply chain to deliver goods and services to the consumers profitably.
What is supply chain?Supply chain is the group of activities performed by an organization to deliver goods and services to the consumer end.
Thus, one of the principle of supply chain strategy is separate the customers on the basis of service needs of different groups and follow the supply chain to deliver goods and services to the consumers so that they earn profit.
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18) Technician A says that adjustable wrenches should be used when
torquing fasteners. Technician B says that adjustable wrenches can round
the edges of fasteners. Which technician is correct?
A) Technician A only
B) Technician B only
O C) Both technicians
D) Neither technician
Answers
A combinational circuit has four inputs (A, B, C, D), which represent a binary-coded-decimal digit. The circuit has two groups of four outputs—S, T, U, V, and W, X, Y, Z. Each group represents a BCD digit. Work here the BCD outputs represent a decimal number that is 1 more than four times the input number. For example, if ABCD - 0011, the outputs are 0001 0011. Assume that invalid BCD digits do not occur as inputs. Construct the truth table
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The truth table for the given combinational circuit with inputs A, B, C, D and outputs S, T, U, V, W, X, Y, Z is constructed by listing all possible input combinations and their corresponding output values.
The truth table is a table that shows the logical output for all possible combinations of input values in a digital circuit. In this case, we have a combinational circuit with four inputs (A, B, C, D) representing a binary-coded-decimal digit. The circuit has two groups of four outputs: S, T, U, V, and W, X, Y, Z. Each group represents a BCD digit. The BCD outputs represent a decimal number that is 1 more than four times the input number.The first step in constructing the truth table is to determine the possible input combinations and the corresponding output values. Since there are four input bits, there are 2^4 = 16 possible input combinations. The inputs A, B, C, and D can take on values of 0 or 1, so the possible input combinations are:0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111,1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111Next, we need to determine the BCD output values for each input combination. We know that the BCD outputs represent a decimal number that is 1 more than four times the input number. Therefore, we can use the following equation to determine the output value:Output = 4 * Input + 1For example, if the input is 0011, then the output is:Output = 4 * 3 + 1 = 13 = 0001 0011 in BCD formatUsing this equation, we can determine the BCD output values for each input combination, as shown in the table below:ABCDOutput (STUVWXYZ)0000000100010001100010010100110011000110100111010011110110000101011001101111011101Now we can construct the truth table by listing all the possible input combinations and the corresponding output values, as shown below:ABCDSTUVWXYZ000000000000000100010001000110000001001000101100000011001100011000001010011101000000111011000010101100101000111011001101011001110101010As a result, the above truth table shows all the possible input combinations and their corresponding output values for a combinational circuit that has four inputs (A, B, C, D) representing a binary-coded-decimal digit.
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Read the following paragraph as quickly as you can, and see if you encounter any diculties.
Aoccdrnig to rscheearch at an Elingsh uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer is at the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit a porbelm. Tihs is bcuseae we do not raed ervey lteter by itslef but the wrod as a wlohe.
This has been presented as an example of a principle of human reading compre-hension. If you keep the rst letter and the last letter of a word in their correct positions, then scramble the letters in between, the word is still quite readable in the context of an accompanying paragraph. However, it seems that this is a bit of a myth and not truly based on solid research.1 In short, for longer words the task is much more dicult. Nonetheless, we are going to imitate the process on some English text.
The task will be to read in a paragraph from a le, scramble the internal letters of each word, and then write the result to a le. Handling punctuation is tricky. You are required to deal with punctuation that comes at the end of a word (period, question mark, exclamation, etc.)|that is, punctuation is left untouched and does not count as the nal unscrambled letter. Optionally, one can deal with the more dicult task of handling all punctuation, such as apostrophes for possessives or hyphenated words. Truly randomizing the order of letters is a task for later in the text, but we can do some reasonable approximations now. Attacking this problem in a divide-and-conquer way should begin by writing code to scramble the letters in a word.
Create a dierent solution by dening scrambling functions for each of the following approaches: (Each approach counts as a dierent problem)
(a) For each letter choose a random number and rotate that letter by the random amount. Import random and use the random.randint(a,b) function where `a' and `b' dene the range of random numbers returned.
(b) Implement a dierent method to scrambling the letters. You must clearly describe in the comments the process to scramble the letters in place.It must be dierent than the process from part a.
Answers
Answer:
a
Explanation:
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While discussing PCV valve operation: Technician A says that the PCV valve opening is decreased at part-throttle operation compared to idle operation. Technician B says that the PCV valve opening is decreased at wide-open throttle compared to part throttle. Who is correct?
Answers
Answer:
Both are incorrect.
Explanation:
PCV valve opening is dependent on amount of manifold vacuum value. The opening cannot decrease due to part throttle operation. The PCV system is a tampered valve whose opening depend upon intake manifold vacuum. PCV valve is supported by a spring and is initially in a closed position.
Electrical Circuit question..
Answers
Answer:
Cool.
Explanation:
Para un intercambiador de calor encargado de precalentar pulpa de fruta, se utiliza agua caliente que entra a 180°C y sale a 78°C, mientras que la pulpa de fruta entra a 3°C y sube su temperatura hasta 55°C. Realizar los esquemas de perfil de temperaturas para un intercambiador de calor que funcione en paralelo y en contracorriente. Además, calcular LMTD.
Answers
Answer:
La diferencia media logarítimica de temperatura del intercambiador en paralelo es aproximadamente 75.466 ºC.
La diferencia media logarítmica de temperatura del intercambiador en contracorriente es aproximadamente 97.881 ºC.
Explanation:
De la teoría de Transferencia de Calor tenemos que un intercambiador de calor en paralelo presenta las siguientes dos características:
1) Tanto el fluido caliente como el fluido frío entran por el mismo lado.
2) Tanto el fluido caliente como el fluido frío salen por el mismo lado.
Mientras que el intercambiador de calor en contracorriente tiene que:
1) El fluido caliente y el fluido frío entran por lados opuestos.
2) El fluido caliente y el fluido frío salen por lados opuestos.
A continuación, anexamos los esquemas de perfil de cada intercambiador.
Ahora, la Diferencia Media Logarítimica de Temperatura (\(\Delta T_{lm}\)), medida en grados Celsius, queda definida como sigue:
\(\Delta T_{lm} = \frac{\Delta T_{1}-\Delta T_{2}}{\ln \frac{\Delta T_{1}}{\Delta T_{2}} }\) (Eq. 1)
Donde \(\Delta T_{1}\) y \(\Delta T_{2}\) son las diferencias de temperatura de los fluidos en cada extremo del intercambiador, medido en grados Celsius.
Procedemos a determinar esas diferencias y la Diferencia Media Logarítimica de Temperatura para cada configuración:
Intercambiador en paralelo
\(\Delta T_{1} = 180\,^{\circ}C-3\,^{\circ}C\)
\(\Delta T_{1} = 177\,^{\circ}C\)
\(\Delta T_{2} = 78\,^{\circ}C - 55\,^{\circ}C\)
\(\Delta T_{2} = 23\,^{\circ}C\)
\(\Delta T_{lm} = \frac{177\,^{\circ}C-23\,^{\circ}C}{\ln \frac{177\,^{\circ}C}{23\,^{\circ}C} }\)
\(\Delta T_{lm} \approx 75.466\,^{\circ}C\)
La diferencia media logarítimica de temperatura del intercambiador en paralelo es aproximadamente 75.466 ºC.
Intercambiador en contracorriente
\(\Delta T_{1} = 180\,^{\circ}C-55\,^{\circ}C\)
\(\Delta T_{1} = 125\,^{\circ}C\)
\(\Delta T_{2} = 78\,^{\circ}C-3\,^{\circ}C\)
\(\Delta T_{2} = 75\,^{\circ}C\)
\(\Delta T_{lm} = \frac{125\,^{\circ}C-75\,^{\circ}C}{\ln \frac{125\,^{\circ}C}{75\,^{\circ}C} }\)
\(\Delta T_{lm} \approx 97.881\,^{\circ}C\)
La diferencia media logarítmica de temperatura del intercambiador en contracorriente es aproximadamente 97.881 ºC.
sump pumps _____ included as part of a home inspection.
Answers
According to the claim, a house inspection consists of checking submersible pumps.
What is a pumpset defined as?Pumpset. Pumpset is an assembly that includes a pumped, a driver, a coupling, and auxiliary parts on a common mounting base with an integrated or standalone fire pump regulator. Document currency is not guaranteed when printed. downloaded the RMIT Local Library on 24 Jul 2015.
What is a pump and how does it operate?All pipes rely on the natural forces of nature to move a liquid. As the moving pump gear (impeller, rotary, piston outer layer, etc.) begins to move, air is pushed aside. A cold air partial vacuum created by air movement might be filled with some more air.
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What differential manufacturer was used
in the Banks Power System Testing
Project?
Answers
Note that the differential manufacturer that was used in the Banks Power System Testing Project is AMSOIL Incorporated.
Who is AMSOIL?AMSOIL Inc. is a Wisconsin-based American firm that primarily formulates and produces synthetic lubricants, gasoline additives, and filters. Throughout the mid-to-late 1960s, company founder Albert J. Amatuzio created numerous synthetic motor oil formulas.
It is to be noted that a differential manufacturer is a company that produces and sells differentials, which are mechanical devices that allow the wheels of a vehicle to rotate at different speeds. Examples of differential manufacturers include Eaton, Dana, and GKN Automotive.
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Which of the following is an example of proprietary system software?LinuxMicrosoft Internet Explorer Microsoft OfficeMicrosoft Windows
Answers
Answer:
Microsoft Windows
Explanation:
Microsoft Windows is an example of proprietary system software. Proprietary software is software that is owned by a specific company or individual and is typically only available for use through a license from the owner. This is in contrast to open-source software, which is freely available for anyone to use, modify, and distribute. Microsoft Windows is a proprietary operating system developed and owned by Microsoft Corporation. It is not open-source and can only be used by individuals or organizations who have purchased a license from Microsoft.
Linux, Microsoft Internet Explorer, and Microsoft Office are not examples of proprietary system software. Linux is a free and open-source operating system, and Microsoft Internet Explorer and Microsoft Office are both proprietary software programs developed and owned by Microsoft Corporation.
the three types of check valves used in hydraulics are
Answers
The three types of check valves commonly used in hydraulics are:
Swing Check ValveBall Check ValvePiston Check ValveWhat is Swing Check Valve?The following three check valve types are frequently employed in hydraulics:
Swing Check Valve: a swing check valve swings open to let fluid flow in one direction and shuts to stop backflow. Ball Check Valve: A ball check valve has a seat inside the valve body and a sphere inside. The pressure pushes the ball away from the seat during forward movement, allowing fluid to pass through.A piston or a disc that moves linearly inside the valve body is used in a piston check valve. The piston or disc rises to make room for the flow while the fluid is flowing in the intended direction.Learn more about Swing Check Valve here:https://brainly.com/question/31786716
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For proper function hydraulics systems need a reservoir of which of the following?
A.) Compressible fluid
B.) Non-compressible fluid C.) Non-compressible air
Answers
Think of brake fluid on a vehicle, compressed as one applies the break= pressure to expand brake cylinders in the wheels which compress the pads on the wheel brake rotors.
Release brake and fluid relaxes back into the reservoir/accumulator.
When rolling two dice, the probability of rolling doubles is 1/6. Suppose that a game player rolls the dice five times, hoping to roll doubles. What is the probability the player gets doubles less than three times in 5 attempts?
Answers
The probability that the player gets doubles less than three times in 5 attempts is; 0.9645.
How to solve Binomial Probability?
The formula for binomial probability distribution is;
P(X = x) = ⁿCₓ × pˣ × (1 - p)⁽ⁿ ⁻ ˣ⁾
where;
x = total number of successes
p = probability of a success on an individual trial
n = number of trials
We are given;
x = 3
p = 1/6 = 0.1667
n = 5
Thus;
P(X < 3) = (⁵C₂ * 0.1667 * (1 - 0.1667)⁽⁵ ⁻ ²⁾) + (⁵C₁ * 0.1667 * (1 - 0.1667)⁽⁵ ⁻ ¹⁾) + (⁵C₀ * 0.1667 * (1 - 0.1667)⁽⁵ ⁻ ⁰⁾)
Thus;
P(X < 3) = 0.9645
Thus, the probability that the player gets doubles less than three times in 5 attempts is 0.9645.
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A coil having a resistance of 10 ohms and an inductance of 4 H is switched across a 20W dc source. Calculate (a) time required by the current to reach 50% of its final steady value, (b) value of the current after 0. 5 second
Answers
(a) The time constant of the circuit can be calculated as:
τ = L/R = 4/10 = 0.4 seconds
At t = τln(2), the current will have reached 50% of its final steady value. Therefore:
t = τln(2) = 0.4ln(2) ≈ 0.277 seconds
(b) The current in the circuit can be calculated using the formula:
i(t) = (V/R)(1 - e^(-t/τ))
At t = 0.5 seconds, we have:
i(0.5) = (20/10)(1 - e^(-0.5/0.4))
≈ 1.98 amps
Therefore, the value of the current after 0.5 seconds is approximately 1.98 amps.
why are excavations measured separately in different categories?
Answers
Excavations are often measured separately in different categories due to several reasons Cost Allocation and Resource Planning.
Cost Allocation: Excavation costs can vary depending on the nature of the excavation work. By measuring excavations separately in different categories, it becomes easier to allocate costs accurately and track expenses associated with specific types of excavation activities. This allows for better cost control and budget management.
Resource Planning: Different types of excavations may require different resources, equipment, and expertise. By categorizing excavations separately, project managers can better plan and allocate resources based on the specific requirements of each category. It ensures that the right resources are available for each type of excavation, optimizing efficiency and productivity.
Performance Evaluation: Measuring excavations separately enables performance evaluation and comparison across different categories. It allows project managers to assess the productivity, efficiency, and quality of work for each type of excavation, identifying areas for improvement and implementing targeted measures to enhance performance.
Compliance and Reporting: Separate categorization of excavations facilitates compliance with regulations and reporting requirements. Certain types of excavations may have specific regulatory standards or reporting obligations that need to be met. By measuring excavations separately, it becomes easier to track and report on compliance with relevant guidelines and regulations.
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when drawing lewis structures, which atoms must receive lone pairs first?
Answers
In drawing Lewis structures, the atoms that must receive lone pairs first are the atoms with the highest electronegativity.
When drawing Lewis structures, we distribute the electrons available in the molecule to satisfy the octet rule, which states that atoms tend to gain, lose, or share electrons in order to have eight electrons in their outermost shell (except for hydrogen, which only needs two electrons). Lone pairs are the pairs of electrons that are not involved in bonding and are located on an atom.
The electronegativity of an atom is the measure of its ability to attract electrons towards itself. When we draw Lewis structures, we follow the principle that the more electronegative atom receives lone pairs first, since it has a greater ability to attract electrons towards itself. This helps to stabilize the molecule and satisfy the octet rule for all the atoms involved.
For example, in a molecule such as HCl, where one hydrogen atom is bonded to a chlorine atom, we know that the chlorine atom is more electronegative than the hydrogen atom. Therefore, we give the lone pairs to the chlorine atom first to satisfy its octet, and the remaining electron is shared between the hydrogen and chlorine atoms to form a covalent bond.
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What should the technician always check when replacing a transformer in an electric heating system to prevent the new transformer from failing like the old one
Answers
When replacing a transformer in an electric heating system, the technician should always check several things to prevent the new transformer from failing like the old one.
These things include the following:1. Power Supply: Check the power supply that feeds the transformer and verify that it's the right voltage. Make sure the transformer is being supplied with the correct voltage and frequency. Also, check for any loose wiring or connections that could cause voltage drops.
If the voltage is too high or too low, it can cause the transformer to fail.2. Load: Verify the electrical load that the transformer is serving and ensure that it is within the transformer's rated capacity. If the load is too high, it can cause the transformer to overheat and fail. If the load is too low, it can cause the transformer to burn out due to insufficient cooling.3. Grounding: Check the transformer's grounding connection to ensure it is connected correctly.
If the grounding is poor, it can cause voltage surges, which can damage the transformer.4. Protection: Check the transformer's protection circuitry to make sure it is working correctly. The protection circuitry is designed to protect the transformer from overloads, overcurrents, and short circuits.
If the protection circuitry is faulty, the transformer can fail.5. Environmental factors: Verify the environmental factors that may be affecting the transformer's operation. Things like temperature, humidity, and vibration can affect the transformer's operation. If the transformer is exposed to high temperatures or vibration, it can cause the winding insulation to break down, which can cause the transformer to fail.
Therefore, when replacing a transformer in an electric heating system, the technician should always check the power supply, load, grounding, protection circuitry, and environmental factors to ensure that the new transformer does not fail like the old one.
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How many different occupations did George Washington Carver have?
Answers
George Washington Carver had a number of different occupations throughout his life. Carver was a highly accomplished and multi-talented individual who made significant contributions to a wide range of fields.
What were the occupations of George Washington Carver?
Some of the most notable occupations include:
Botanist and plant scientist: Carver was a renowned expert in botany and plant science, and he conducted extensive research on the cultivation and use of different crops, such as peanuts and sweet potatoes.Agricultural chemist: Carver was a pioneering agricultural chemist who developed new methods for improving soil fertility and crop production.Educator: Carver was a dedicated educator who taught at the Tuskegee Institute for over 40 years. He was known for his innovative teaching methods and his ability to inspire students.Artist: Carver was a talented artist who created many drawings and paintings that depicted the beauty and diversity of the natural world.Inventor: Carver was a prolific inventor who created more than 300 different products from peanuts and sweet potatoes, including soap, ink, and paint.Philanthropist: Carver was a philanthropist who dedicated his life to improving the lives of African Americans through education and scientific research.He is widely regarded as one of the most important figures in the history of American agriculture and science.
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A drug user who reports "hearing" colors and "seeing" sounds has most likely used _______
A. LSD
B. speed
C. stimulants.
Answers
Hope this helps x
Deviations from the engineering drawing can’t be made without the approval of the
Answers
Engineer's approvall makes it appropriate to alter from the drawing
What is Engineering drawing?Engineering drawing is a document that contain the design of an engineer represented in a sketch.
deviating fron the drawing is same as deviating from the design. it is therefore necessary to call the engineers attention before altering the drawing.
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it is the tool used to measure the amount of electric current
Answers
Answer:
Ammeter
Explanation:
Instrument for measuring either direct or alternating electric current, in amperes. Ammeters vary in their operating principles and accuracies
Answer:
ammeter is used to measure electric current.
What two things must be included in your function definition?
•A function name and commands to be performed
o
•Function variables and commands to be performed
•Commands to be performed and function arguments
• A function name and function variables
Answers
Explanation:
commands to be and function arguments
The two (2) things that must be included in your function definition are: D. A function name and function variables.
What is a function?A function can be defined as a set of statements that comprises executable codes and can be used in a software program to calculate a value or perform a specific task on a computer.
In Computer programming, there are two (2) things that must be included in a function definition and these include the following:
A function name.Function variables.Read more on function here: brainly.com/question/20264183
QUESTION:
Which statement is true about portable fire extinguishers?
POSSIBLE ANSWERS:
OAir-pressurized water extinguishers put out electrical fires.
Dry chemical, sodium bicarbonate extinguishers put out most fires.
Dry chemical, mono ammonium phosphate extinguishers put out flammable liquid fires.
OCarbon dioxide extinguishers put out wood fires.
Submit Answer
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Review/Edit Your Answer
Answers
Until emergency assistance arrives, portable fire extinguishers can put out or manage a fire.
When should Portable fire extinguishers be used?The use of portable fire extinguishers can put out or contain a fire until emergency assistance is received.
Utilize portable units exclusively for small flames or fires that are still in the early stages because their discharge times are often only a few seconds. Make a plan for a getaway. Avoid breathing in the extinguishing agent and smoke by keeping low to the ground.
Only use a portable fire extinguisher when a fire is small, restricted to a single area, and not made up of extremely flammable materials. If the fire becomes out of control, leave the premises right away and get assistance.
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In unguided medium (free space), the electromagnetic (EM) signal wave spreads as it leaves the transmit antenna. Since the power of the EM signal resides at the surface area of the wave front, signal power is described as signal power density (i.e., watts per area).
a. True
b. False
Answers
Answer:
a. True
Explanation:
A student places a piece of a potato into a container of hydrogen peroxide. One observation the student makes is that bubbles form around the potato. The presence of bubbles might indicate the formation of a new substance because bubbles
a - Group of answer choices always rise to the top of a liquid.
b- are almost always perfectly spherical.
c- could show that a gas is forming.
d- usually burst after a few minutes.
Answers
given t, p, and/or v, determine the missing property (t, p, or v), the phase, and the quality (if two phases exist) for each of the following cases: a) water at 200°c and 50 kpa b) water at 600°f and 0.1 ft3 /lbm c) water at 240°c and 30,000 kpa d) ammonia at 300°f and 1.4994 ft3 /lbm
Answers
a) The missing property is the specific volume (v).
b) The missing property is the pressure (p).
c) There is no distinct vapor or liquid phase, and the missing property cannot be determined.
d) The missing property is the pressure (p).
To determine the missing property (temperature, pressure, or specific volume), phase, and quality (if two phases exist) for each case, we can refer to the phase diagrams and properties of water and ammonia. Let's analyze each case:
a) Water at 200°C and 50 kPa:
Given temperature and pressure, we need to determine the missing property, phase, and quality (if applicable).
From the phase diagram of water, we observe that at 50 kPa, water is in the vapor phase at 200°C.
Therefore, the missing property is the specific volume (v).
b) Water at 600°F and 0.1 ft3/lbm:
Given temperature and specific volume, we need to determine the missing property, phase, and quality (if applicable).
To convert the temperature from Fahrenheit to Celsius:
T(°C) = (T(°F) - 32) × 5/9
T(°C) = (600 - 32) × 5/9 ≈ 315.56°C
From the phase diagram of water, we observe that at 315.56°C, water is in the vapor phase at low pressures.
Therefore, the missing property is the pressure (p).
c) Water at 240°C and 30,000 kPa:
Given temperature and pressure, we need to determine the missing property, phase, and quality (if applicable).
From the phase diagram of water, we observe that at 240°C and 30,000 kPa, water is in the supercritical phase. The supercritical phase exists above the critical point of water.
Therefore, there is no distinct vapor or liquid phase, and the missing property cannot be determined.
d) Ammonia at 300°F and 1.4994 ft3/lbm:
Given temperature and specific volume, we need to determine the missing property, phase, and quality (if applicable).
To convert the temperature from Fahrenheit to Celsius:
T(°C) = (T(°F) - 32) × 5/9
T(°C) = (300 - 32) × 5/9 ≈ 148.89°C
From the phase diagram of ammonia, we observe that at 148.89°C, ammonia is in the vapor phase at low pressures.
Therefore, the missing property is the pressure (p).
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