Answer:
In java, Write an expression that continues to bid until the user enters 'n'.
import java.util.Random;
import java.util.Scanner;
public class AutoBidder {
public static void main (String [] args) {
Scanner scnr = new Scanner(System.in);
Random randGen = new Random();
char keepGoing = '-';
int nextBid = 0;
randGen.setSeed(5);
while (/* Your solution goes here */) {
nextBid = nextBid + (randGen.nextInt(10) + 1);
System.out.println("I'll bid $" + nextBid + "!");
System.out.print("Continue bidding? ");
keepGoing = scnr.next().charAt(0);
}
System.out.println("");
return;
}
}
Explanation:
Hope it's help you ;)
Java is a high-level programming language that has a concise syntax and is designed to be platform-independent. It is also a multi-paradigm programming language, which means that it supports a variety of programming styles, including object-oriented, imperative, and functional programming.
A do-while loop is a control flow statement that executes a block of code at least once before testing the condition. In other words, the loop will always execute once before checking the condition to see if it should execute again.
To implement a program that continues to bid until the user enters 'n' in Java, you can use a do-while loop. Here is an example:
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String response;
do {
System.out.println("Enter your bid:");
int bid = scanner.nextInt();
System.out.println("You bid " + bid);
System.out.println("Do you want to continue bidding? (y/n)");
response = scanner.next(); }
while (!response.equals("n"));
System.out.println("Bidding is over."); }}
This program prompts the user to enter a bid, displays the bid, and then prompts the user to enter 'y' to continue bidding or 'n' to stop bidding. If the user enters 'n', the program will exit the loop and display a message that bidding is over. In conclusion, you can use a do-while loop in Java to implement a program that continues to bid until the user enters 'n'.
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Taking the convection heat transfer coefficient on both sides of the plate to be 860 W/m2 ·K, deter- mine the temperature of the sheet metal when it leaves the oil bath. Also, determine the required rate of heat removal from the oil to keep its temperature constant at 45°C.
Answer:
Hello your question is incomplete attached below is the complete question
answer :
a) 95.80°C
b) 8.23 MW
Explanation:
Convection heat transfer coefficient = 860 W/m^2 . k
a) Calculate for the temp of sheet metal when it leaves the oil bath
first step : find the Biot number
Bi = hLc / K ------- ( 1 )
where : h = 860 W/m^2 , Lc = 0.0025 m , K = 60.5 W/m°C
Input values into equation 1 above
Bi = 0.036 which is < 1 ( hence lumped parameter analysis can be applied )
next : find the time constant
t ( time constant ) = h / P*Cp *Lc --------- ( 2 )
where : p = 7854 kg/m^3 , Lc = 0.0025 m , h = 860 W/m^2, Cp = 434 J/kg°C
Input values into equation 2 above
t ( time constant ) = 0.10092 s^-1
Determine the elapsed time
T = L / V = 9/20 = 0.45 min
∴ temp of sheet metal when it leaves the oil bath
= (T(t) - 45 ) / (820 - 45) = e^-(0.10092 * 27 )
T∞ = 45°C
Ti = 820°C
hence : T(t) = 95.80°C
b) Calculate the required rate of heat removal form the oil
Q = mCp ( Ti - T(t) ) ------------ ( 3 )
m = ( 7854 *2 * 0.005 * 20 ) = 26.173 kg/s
Cp = 434 J/kg°C
Ti = 820°C
T(t) = 95.80°C
Input values into equation 3 above
Q = 8.23 MW
according to the text in chapter 2, what is the most important function of an enterprise application?
In Chapter 2, the most important function of an enterprise application is not explicitly mentioned. However, enterprise applications typically serve multiple functions that are crucial for organizations.
Some of the essential functions of enterprise applications include:
Automation: Enterprise applications automate various business processes, reducing manual effort and improving efficiency. They streamline workflows, handle repetitive tasks, and enable consistent and accurate data processing.
Integration: Enterprise applications facilitate the integration of different systems and processes within an organization. They enable seamless data exchange and communication between departments, systems, and stakeholders, promoting collaboration and enhancing decision-making.
Data Management: Enterprise applications play a vital role in managing and organizing large volumes of data. They provide tools for data capture, storage, retrieval, analysis, and reporting. Effective data management enables organizations to derive insights, make informed decisions, and gain a competitive edge.
Scalability: Enterprise applications are designed to scale and adapt to changing business needs. They can handle increasing data volumes, user loads, and business growth without compromising performance or stability.
Security: Enterprise applications incorporate robust security measures to protect sensitive business data and prevent unauthorized access. They employ encryption, authentication, authorization, and other security mechanisms to ensure data confidentiality, integrity, and availability.
While the specific importance of enterprise applications may vary depending on the organization and its industry, these functions are generally recognized as crucial for effectively managing business operations, improving productivity, and achieving organizational goals.
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An Ideal gas is being heated in a circular duct as while flowing over an electric heater of 130 kW. The diameter of duct is 500 mm. The gas enters the heating section of the duct at 100 kPa and 27 deg C with a volume flow rate of 15 m3/s. If heat is lost from the gas in the duct to the surroundings at a rate of 80 kW, Calculate the exit temperature of the gas in deg C. (Assume constant pressure, ideal gas, negligible change in kinetic and potential energies and constant specific heat; Cp =1000 J/kg K; R = 500 J/kg K)
Answer:
Exit temperature = 32 °C
Explanation:
We are given;
Initial Pressure;P1 = 100 KPa
Cp =1000 J/kg.K = 1 KJ/kg.k
R = 500 J/kg.K = 0.5 Kj/Kg.k
Initial temperature;T1 = 27°C = 273 + 27K = 300 K
volume flow rate;V' = 15 m³/s
W = 130 Kw
Q = 80 Kw
Using ideal gas equation,
PV' = m'RT
Where m' is mass flow rate.
Thus;making m' the subject, we have;
m' = PV'/RT
So at inlet,
m' = P1•V1'/(R•T1)
m' = (100 × 15)/(0.5 × 300)
m' = 10 kg/s
From steady flow energy equation, we know that;
m'•h1 + Q = m'h2 + W
Dividing through by m', we have;
h1 + Q/m' = h2 + W/m'
h = Cp•T
Thus,
Cp•T1 + Q/m' = Cp•T2 + W/m'
Plugging in the relevant values, we have;
(1*300) - (80/10) = (1*T2) - (130/10)
Q and M negative because heat is being lost.
300 - 8 + 13 = T2
T2 = 305 K = 305 - 273 °C = 32 °C
13000 + 300 - 8000 = T2
Saturated refrigerant-134a vapor at 15 psia is compressed reversibly in an adiabatic compressor to 80 psia. Determine the work input to the compressor. Use the tables for R-134a.
The initial enthalpy and the entropy of the saturated water can be found out from the table of A-12E
i.e. \($h_1= 101 \ \text{Btu/lbm}$\)
\($s_1 = 0.22717 \text{ Btu/lbmR}$\)
Since the process mentioned above is an adiabatic compression process, the entropy will remain constant throughout the process. Therefore, we take the value of entropy and the final pressure using the table with few interpolations and also approximations to find the final enthalpy. It is given by :
\($h_2= 116.09 \text{ Btu/lbm}$\)
So the work input from the energy balance equation :
\($\dot{W} + \dot{m}h_1 = \dot{m}h_2$\)
\($w=h_2 - h_1$\)
= 116.09 - 101
= 15.09
Therefore, \($w= 15.09 \text{ Btu/lbm}$\)
Feature toggles are useful for which activity?a) To enable continuous testingb) To prevent testing complexityc) To decouple deployment from released) To enable continuous code integeration
It is to be noted that Feature toggles are useful "To enable continuous code integration" (Option D)
What are Feature Toggles?A feature toggle is a method in software development that allows code to be turned "on" or "off" remotely without the need for a deploy. Product, engineering, and DevOps teams frequently employ feature toggles for canary releases, A/B testing, and continuous deployment.
In software development, a feature toggle is an alternative to keeping numerous feature branches in source code. During runtime, a condition in the code enables or disables a functionality. In agile environments, the toggle is used in production to turn on a feature on demand for certain or all users.
Feature flags and toggles are no longer merely best practices for software delivery, but are now increasingly essential for business operations. With the correct feature management platform, you can test new code securely, receive real-time feedback, and iterate rapidly.
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Which of the following is a better thesis statement? Freedom is not free. American’s veterans pay a high price for our freedom. America’s veteran’s defend our freedom, but they sacrifice their personal ambitions and their lives, and many of them suffer physically and mentally from their experiences.
Answer:
C). America’s veterans defend our freedom, but they sacrifice their personal ambitions and their lives, and many of them suffer physically and mentally from their experiences.
Explanation:
A good thesis statement must provide the central idea or theme of the paper or the essay in a capsule form along with its theoretical base. The key characteristics of a thesis statement are its arguability, specificity, and intensity. As per these descriptions, the above statement correctly relates the main point('America's...freedom') very clearly and precisely. It also contains the arguability which can be supported through further evidences.
Estimate properties and pipe diameter Determine the diameter of a steel pipe that is to carry 2000 gal/min of gasoline with a pressure drop of 5 psi per 100 ft of horizontal pipe. Pressure drop is a function of flow rate, length, diameter, and roughness. Either iterative methods OR equation solvers are necessary to solve implicit problems. Total head is the sum of the pressure, velocity, and elevation. What is the density of gasoline
Answer:
Diameter of pipe is 0.535 ft
Explanation:
see attachment, its works out 1st half
a linked list class must take care of removing the dynamically allocated nodes. this is done by. a.the constructor functionb.the destructor functionc.overriding the removal functiond.overloading the memory persistence operatore.None of these
A linked list class must take care of removing the dynamically allocated nodes. This is done by "the destructor function".
The destructor function is a special member function of a class that is responsible for freeing the memory allocated to objects of that class. In the case of a linked list class, the destructor function should delete the nodes of the linked list and free the memory allocated to them. This ensures that there are no memory leaks when the linked list object goes out of scope or is explicitly destroyed. The constructor function is responsible for initializing the object's data members when it is created. Overriding the removal function or overloading the memory persistence operator may be necessary for certain applications, but is not necessary for the basic functionality of a linked list class.
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The property of a material by virtue of which it can be beaten or rolled into plates is called.
In conclusion, malleability is the characteristic that enables materials to be easily shaped into plates or sheets through beating or rolling.
The property of a material by virtue of which it can be beaten or rolled into plates is called malleability. Malleability refers to a substance's ability to undergo deformation without breaking or cracking, allowing it to be flattened into thin sheets or plates. This property is commonly observed in metals like gold, silver, copper, and aluminum.
These metals can be hammered or rolled into various shapes and sizes, including plates or foils, due to their malleable nature. For example, gold leaf used in gilding is made by hammering gold into extremely thin sheets.
In conclusion, malleability is the characteristic that enables materials to be easily shaped into plates or sheets through beating or rolling.
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A triangular plate with a base 5 ft and altitude 3 ft is submerged vertically in water. If the base is in the surface of water, find the force against onr side of the plate. Express the hydrostatic force against one side of the plate as an integral and evaluate it. (Recall that the weight density of water is 62.5 lb/ft3.)
Answer:
Hydrostatic force = 41168 N
Explanation:
Complete question
A triangular plate with a base 5 ft and altitude 3 ft is submerged vertically in water so that the top is 4 ft below the surface. If the base is in the surface of water, find the force against onr side of the plate. Express the hydrostatic force against one side of the plate as an integral and evaluate it. (Recall that the weight density of water is 62.5 lb/ft3.)
Let "x" be the side length submerged in water.
Then
w(x)/base = (4+3-x)/altitude
w(x)/5 = (4+3-x)/3
w(x) = 5* (7-x)/3
Hydrostatic force = 62.5 integration of x * 4 * (10-x)/3 with limits from 4 to 7
HF = integration of 40x - 4x^2/3
HF = 20x^2 - 4x^3/9 with limit 4 to 7
HF = (20*7^2 - 4*7^(3/9))- (20*4^2 - 4*4^(3/9))
HF = 658.69 N *62.5 = 41168 N
Technician A says that reversing the direction of refrigerant (as with a heat pump system) could be done to provide cabin heat. Technician B says that the amount of energy loss from the traditional drive belt and electric clutch A/C system is too high for hybrid and electric vehicles. Who is correct?
It can be noted that technician B is correct as amount of energy loss from the traditional drive belt and electric clutch A/C system is too high for hybrid and electric vehicles.
What is energy?Energy simply means the property that is transferred to a body.
In this case, Technician A says that reversing the direction of refrigerant as with a heat pump system could be done to provide cabin heat. This is incorrect because this is done to remove heat.
Therefore, the correct person is technician B.
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Technician A says that the computer can be used to control the output of the alternator by controlling the field current. Technician B says that voltage regulators control the alternator output by controlling the field current through the rotor. Which technician is correct
The voltage regulators control the alternator output by controlling the field current through the rotor, so Technician B is correct.
Voltage regulators control the alternator output by regulating the field current through the rotor. The voltage regulator is an integral part of the alternator system and is responsible for monitoring the electrical output of the alternator and adjusting the field current to maintain a stable voltage.
The voltage regulator continuously monitors the electrical system's voltage and sends a signal to the alternator to adjust the field current accordingly. If the voltage drops below the desired level, the regulator increases the field current, which boosts the alternator's output. Conversely, if the voltage rises above the desired level, the regulator decreases the field current to reduce the alternator's output.
While computers and electronic control systems are used in modern vehicles to monitor and control various aspects of the electrical system, such as engine performance and emissions, they do not directly control the output of the alternator by manipulating the field current. The voltage regulator is responsible for that task.
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what is hypertension?
Answer:
Hypertension is a form of blood pressure
Explanation:
It is a form of blood pressure which can lead to serious health issues and complications. It is caused by many factors such as obesity, smoking, sedentary lifestyle, lack of physical activity, high intake of alcohols and salt, stress, and also aging. In serious cases it leads to heart disease, stroke, and even death
A traditional children's riddle concerns a farmer who is traveling with a sack of rye, a goose, and a mischievous dog. The farmer comes to a river that he must cross from east to west. A boat is available, but it only has room for the farmer and one of his possessions. If the farmer is not present, the goose will eat the rye or the dog will eat the goose. We wish to design a circuit to emulate the conditions of this riddle. A separate switch is provided for the farmer, the rye, the goose and the dog. Each switch has two states, depending on whether the corresponding object is on the east bank or the west bank of the river. The rules of play stipulate that no more than two switches be moved at a time and that the farmer must move (to row the boat) each time switch are moved. The switch for the farmer provides logic signal F, which is high if the farmer is on the east bank and low if he is on the west bank. Similar logic signals (G for the goose, D for the dog and R for the rye) are high if the coilresponding object is in the east bank and low if it is on the west bank. The logic signal A (Alarm), which is the output, is high any time the rye or the goose are in danger of being eaten. [15] i) Prepare the truth table listing all combinations of the input signals F, G, D and R. Also show the desired value of the output, A, for each row in the truth table. Hence determine the SOP and POS expressions from your table. ii)
i) Truth table listing all combinations of the input signals F, G, D and R:Given: Switch for the farmer provides logic signal F, which is high if the farmer is on the east bank and low if he is on the west bank. Similar logic signals (G for the goose, D for the dog, and R for the rye) are high if the corresponding object is in the east bank and low if it is on the west bank.
The logic signal A (Alarm), which is the output, is high any time the rye or the goose is in danger of being eaten.F G D R A0 0 0 0 00 0 0 1 10 0 1 0 10 1 0 0 10 1 1 0 10 1 1 1 1Now, the desired value of the output, A, for each row in the truth table is shown below: 0000 0001 0010 0100 1000 1111ii) SOP (Sum of Products) and POS (Product of Sums) expressions from the truth table:The sum of products (SOP) is A = F' G' D' R + F' G' D R' + F G' D' R' + F G' D R' + F G D' R'The product of sums (POS) is A = (F + G + D' + R')(F + G' + D + R')(F' + G + D + R')(F + G' + D' + R')(F + G + D' + R')Therefore, the SOP expression from the truth table is A = F' G' D' R + F' G' D R' + F G' D' R' + F G' D R' + F G D' R' and the POS expression from the truth table is A = (F + G + D' + R')(F + G' + D + R')(F' + G + D + R')(F + G' + D' + R')(F + G + D' + R').Explanation:This problem is related to the logic circuit that should be designed to replicate the conditions of a riddle that involves a farmer who has a sack of rye, a goose, and a mischievous dog. When the farmer comes across a river, he must cross it from east to west. A boat is available, but it only has space for the farmer and one of his possessions. If the farmer is not present, the goose will eat the rye or the dog will eat the goose. A circuit is required to replicate this riddle's conditions, with four switches provided for the farmer, the rye, the goose, and the dog.
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Design a double angle section for the lower chord of the roof truss depicted below. Allow for a double row of bolt holes in the larger leg. The smaller leg of the double angle used for the lower chord does not have bolts. Finally, assume no fewer than 3 bolts per line in the direction of the load. Use ASD.
ok zcxnlegdjbfxbkqlu
jksdczruiorth
6–23. the beam supports a uniform dead load of 500 lb>ft and a single live concentrated force of 5 k. determine (a) the maximum negative moment at e, and (b) the maximum positive shear at e. assume the support at d is a pin, a and c are rollers, and b is a pin.
The maximum negative moment at E is -22500lb-ft
The maximum positive shear at E is 4750lb
Given the following:
Dead load=500
Single concentrated force=5k
Part a
Maximum negative moment at E
To get maximum negative moment at E, place the point load at B:
Moment=(1/2*4.5*18*500)-(1/2*4.5*18*500)-(5000*4.5)
=20250-20250-22500
=-22500lb-ft
Part b
Maximum positive shear at e
To get maximum positive shear at E, place the vertical load either B or right of E:
Shear=(1/2*0.5*18*500)-(1/2*0.5*9*500)+(1/2*0.5*9*500)+(5000*0.5)
=2250-1125+1125+2500
=2250+2500
=4750
Shear at E=4750lb
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Instantaneous rate of change what is it called in terms
Which of the following is false about most machine learning models?
They require numbers or collections of numbers as input.
They are flexible enough to handle all issues you might see in your dataset (lack of data, incorrect data, etc)
They are trained by iteratively adjusting their parameters to minimize a loss function.
Once trained, their model parameters can be used to make new predictions in a process called a “model inference algorithm.”
The false statement about most machine learning models is that: B. they are flexible enough to handle all issues you might see in your dataset (lack of data, incorrect data, etc).
What is machine learning?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.
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Select the correct answer. What does a mechanical engineer do? O A. Designs buildings. OB. Designs roads. C. Designs consumer products. D. Designs machines,
Answer:
d
Explanation:
The ans is d, from the word mechanical dealing with machines
Have no idea what I need to do
find the minimum coefficient of friction μμmu needed to prevent the spherical shell from slipping as it rolls down the slope
The minimum coefficient of friction required to prevent slipping is sin(38.0°) which is 0.615.
What is the minimum coefficient of friction required to prevent slipping?To get minimum coefficient of friction (μ) required to prevent slipping, we will equate the gravitational force component along the slope to the frictional force.
The gravitational force component along the slope can be calculated as: Fg = m * g * sin(θ).
The frictional force can be calculated as: Ff = μ * N,
Setting Fg = Ff, we have:
m * g * sin(θ) = μ * N
m * g * sin(θ) = μ * m * g
sin(θ) = μ
So, the minimum coefficient of friction needed to prevent slipping is equal to the sine of the angle of the slope which is sin(38.0°).
Full question:
A hollow, spherical shell with mass 2.00kg rolls without slipping down a slope angled at 38.0?. Find the minimum coefficient of friction needed to prevent slipping.
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describe the differences in the timing and magnitude of
discharge peaks in the upper parts of drainage basins (i.e
headwaters), and lower parts of drainage basins (near mouth),
following a precipitati
The upper parts of drainage basins have quicker discharge peak timings and lower magnitudes, while the lower parts have later discharge peak timings and higher magnitudes.
The timing and magnitude of discharge peaks in the upper parts of drainage basins and lower parts of drainage basins following a precipitation event can be quite different. In the headwaters or upper parts of the drainage basin, the precipitation can quickly flow downhill and enter the river channel.
In contrast, in the lower parts of the drainage basin near the mouth of the river, the precipitation may take longer to travel downstream and enter the river channel. This is because the water may be intercepted by vegetation, infiltrate into the soil, or fill up groundwater storage.
The peak discharge may occur relatively quickly after the precipitation event, and the magnitude of the discharge may be relatively high due to the steep slopes and the limited storage capacity of the channel. The peak discharge may occur later than in the headwaters, and the magnitude of the discharge may be lower due to the larger storage capacity of the channel and the surrounding floodplains.
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A cat is fed a diet designed for dogs. Which amino acid is most likely to be deficient in this cat's diet?
Answer:
Your cat may also be a risk of a taurine deficiency if he or she enjoys sampling your dog's food. Dog food doesn't contain taurine, as dogs can create their own supply of the amino acid. Although your cat may like the taste, a steady diet of dog food is a bad idea
hope this helps
The first generation of computers used microprocessors.
Group of answer choices
True
False
Answer:
False
Explanation:
first generation Computer uses vaccum tube.
Microprocessor was used by third generation Computer
(. ❛ ᴗ ❛.)
Modern aircraft are designed in a way that, when all seats are occupied, the baggage compartment is full, and all fuel tanks are full, the aircraft is:
Modern aircraft are designed in a way that, when all seats are occupied and baggage is full, and all fuel tanks are full, the aircraft is overloaded.
What is aircraft storage?Aircraft storage refers to all storage systems in an aircraft for human transportation and also to transport products among countries.
The aircraft storage system is well calculated to work is a maximum capacity in commercial fly lines.
In conclusion, modern aircraft are designed in a way that, when all seats are occupied and baggage is full, and all fuel tanks are full, the aircraft is overloaded.
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On-site oil storage containers must be marked “Used Oil.”
True
False
Answer:true
Explanation:g
On-site oil storage containers must be marked “Used Oil.” is the true statement.
What kind of container can be store oil in?Steel containers have long been used to hold oils and other liquids, but regular steel is known to rust, corrode, and degrade more quickly than stronger materials. A stainless steel container offers more protection, and storing oil in one won't result in rust problems.
Use of glass or metal containers is their greatest option. If a person plan to store something in the refrigerator, use containers that can handle the cold. No matter what kind of oil you have, you must keep it away from light. Always keep them out of the way, covered, and away from direct light. The oil should be kept in a cool, dark location, like your pantry. Keep it away from the light and the stove. The oil will oxidize more quickly in the presence of heat and light.
Thus, it is a true statement.
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Avapor mixture containing 50.0 mole % benzene and 50.0 mole % toluene at 1 atm is cooled isobarically in a closed container from an initial temperature of 115°C. Use the Tsy diagram below to answer the following questions. 115 110 1400 1300 105 100 Vapor 1200 95 Temperature (°C) 90 Liquid 1100 1000 900 Pressure (mm Hg) Liquid 85 800 Vapor 80 700 75 70 600 500 0 1.0 65 0 10 0.2 0.4 0.6 0.8 Mole fraction henvene Polarm 0.2 0.4 0.6 0.8 Mole fraction benzene 7100 First Condensation Your answer is partially correct. At what temperature does the first drop of condensate form? 104 °C What is its composition? 0.20 mol benzene/mol
Last Condensate Your answer is partially correct. At what temperature does the last bubble of vapor condense? °C 98 What is its composition? 0.53 mol benzene/mol
Answer:
105°touch sensce what I could wathskb
The manager of a small post office is concerned that the growing...
The manager of a small post office is concerned that the growing township is overloading the one-window service being offered. Sample data are collected on 100 individuals who arrive for service:
TIME BETWEEN
ARRIVALS (MINUTES) FREQUENCY
1 5
2 32
3 35
4 19
5 9
100
SERVICE TIME
(MINUTES) FREQUENCY
1.0 12
1.5 21
2.0 36
2.5 19
3.0 7
3.5 5
100
Using the following random number sequence, simulate six arrivals (Hint: Use random number set from 00 to 99.)
RN: 93, 5, 53, 20, 10, 45, 67, 55, 92, 75, 41, 46, 58, 82, 20, 97, 13, 36
a. Average customer waiting time, in minutes (Round your answer to 4 decimal places.)
Average customer waiting time minutes
b. Average percent idle time for clerks.
Average percent idle time
Answer:
its b
Explanation:
Cho biết tác dụng chung của các hệ giằng khung ngang nhà công nghiệp nhẹ 1 tầng 1 nhịp.
You have been asked to assess an old storage tank with an unknown thickness. The outer diameter was measured to be do = 2.0 m. The vessel is made of cold-rolled steel, which has the following material properties: Esteel = 200 GPa, Vsteel = 0.3, Oyield = 485 MPa, Oult = 590 MPa. To determine the thickness, a test pressure of p= 3.5 MPa was applied inside of the vessel at the same time the strain was measured on the outside of the vessel using a strain gauge that was initially L. = 20 mm long. An elongation of 8 = 0.012 mm was measured by the strain gauge when the test pressure was applied 20 mm (a) Using the test pressure case, determine the thickness of the pressure vessel, t.
The thickness of the vessel wall is estimated to be around 29.2 mm.
How to solve for the thickness of the pressureσ = pr/t
where p is the internal pressure, r is the internal radius of the vessel, and t is the thickness of the vessel wall.
Rearranging for t we get:
t = pr/σ
We can substitute σ from the strain equation into the thickness equation:
t = pr/(E*ε)
The strain ε is the elongation divided by the original length, so ε = 0.012 mm / 20 mm = 0.0006.
The radius r is half of the outer diameter: r = d/2 = 2.0 m / 2 = 1.0 m.
Substituting the known values:
t = (3.510^6 Pa * 1.0 m) / (20010^9 Pa * 0.0006) ≈ 0.0292 m or 29.2 mm.
So, the thickness of the vessel wall is estimated to be around 29.2 mm.
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