In this command, the Rep ID column is set as the PRIMARY KEY, and the default value of 'Y' is assigned to the Comm column, indicating that the sales representative earns a commission by default.
The SQL command. To modify the SQL command so that the Rep ID column is the PRIMARY KEY for the table and the default value of Y is assigned to the Comm column, follow these steps:
Add the PRIMARY KEY constraint to the Rep ID column.Set the DEFAULT value of the Comm column to Y.Here is the modified SQL command:
```sql
CREATE TABLE SalesRepresentatives (
Rep ID INT PRIMARY KEY,
Rep Name VARCHAR (255),
Comm CHAR (1) DEFAULT 'Y'
```
In this command, the Rep ID column is set as the PRIMARY KEY, and the default value of Y is assigned to the Comm column, indicating that the sales representative earns a commission by default.
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The PCV valve controls which emissions?
Answer:
The PCV reduces blowby emissions from the engine.
a dipole of moment p=Qa coul-m is aligned parallel to an electric field along the x axis. The field is non-uniform and varies in magnitude lineary along the x axis with a rate of change dE/dx=K. find the force on the dipole.
Answer:
F = Qa*K
Explanation:
The force on the dipole is expressed as the negative gradient of the potential energy.
Thus;
Force; F = -dU/dx
Now, the potential energy is given as;
U = -pE
So, dU/dx = -pdE/dx
Since F = -dU/dx
Then, F = p*dE/dx
We are given p = Qa
Then;
F = Qa(dE/dx)
We are given that dE/dx = K
Thus;
F = Qa*K
How many snaps points does an object have?
Answer:
what do you mean by that ? snap points ?
Vacancy diffusion statement refer to that a mechanism that
atom at lattice traveled to a vacant latblèe
• True
• False
Answer:
true
Explanation:
Consider the function represented by the equation x – y = 3. What is the equation written in function notation, with x as the independent variable?
Answer:
f(x) = x -3
Explanation:
Solve for y, then replace y by f(x).
x - y = 3
x - 3 = y . . . . . add y-3 to both sides
f(x) = x -3
Answer:
(x) = x – 3
Explanation:
edge
What is the biggest challenge in performing password cracking on pre-shared keys and getting results that are worthwhile
The biggest challenge in cracking pre-shared keys is obtaining the encrypted passwords in the first place. If the password hashes are not obtainable, cracking becomes infeasible.
What is cracking on pre-shared keys ?Pre-shared key password cracking entails making an effort to identify the original password or key that was used to encrypt data or safeguard a system. To guess the original password, different strategies like brute-force, dictionary attacks, or hybrid assaults are generally used after getting the encrypted password hashes, which are mathematical representations of the original password.
The sheer volume of potential password combinations that must be examined presents the biggest obstacle to breaking pre-shared keys. The quantity of possible password combinations and the computing power at hand directly influence how long it takes to crack a password. Therefore, even with powerful computers, breaking strong passwords that are lengthy and contain a combination of letters, numbers, and symbols might take a while.
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A s100 N m torque is applied to a 1-m-long, solid round steel shaft. Design it to limit its angular deflection 2°, if shear modulus of elasticity 80 GPa and to determine the fatigue strength of the material.
Answer:
assuming factor of safety of 2
Se = 118.858 MPa
Explanation:
Torque = ± 100 N m
length of solid round steel shaft = 1-m
Angular deflection = 2°
shear modulus of elasticity = 80 GPa
Calculate Fatigue strength of material
apply Von-miss effective stress rule to determine the Von mises stress
max torque = 100 + 0
assuming a factor of safety of 2
Se(fatigue strength of material ) = Von mises stress * Fs
= 59.429 * 2 = 118.858 MPa
what is the difference between a stepped and a non-stepped ECT circuit?
Answer:
A stepped circuit is designed in the engine coolant temperature (ECT) sensor within a powertrain control module (PCM) to increase the sensor's accuracy. A simple non-stepped ECT sensor circuit has a specific resistance which increases or decreases according to the changes in engine coolant temperature.
Explanation:
IT projects fail for all of the following reasons except:
a. Missed deadlines
b. Dissatisfied customers
c. Users' needs that are not met
d. Support from top management
The correct answer is d. Support from top management.
IT projects can fail for a variety of reasons, including missed deadlines, dissatisfied customers, and users' needs that are not met.
What are the other reasons for Fail of IT projects?These reasons are not the only potential causes of project failure, and support from top management is not a factor that typically leads to the failure of IT projects.
In fact, support from top management is often seen as a key factor in the success of an IT project, as it can provide the resources and guidance necessary for the project to be completed successfully.
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If the DC load is determined to be 1200 watts at 12 volts, calculate the DC load current. Can a 20-amp rated charge controller handle the maximum DC load current that will pass through it?
DC load is determined to be 1200 watts at 12 volts, calculate the DC load current.
The DC load current is 100 amperes.The maximum DC load current that will pass through a 20-ampere rated charge controller cannot be handled. Since the DC load current is 100 amperes, the 20-ampere rated charge controller is insufficient to handle the maximum DC load current.
The formula for determining the DC load current is as follows:Power = Voltage x CurrentI = P / V = 1200/12 = 100 AThe DC load current is 100 amperes.The maximum DC load current that will pass through a 20-ampere rated charge controller cannot be handled. Since the DC load current is 100 amperes, the 20-ampere rated charge controller is insufficient to handle the maximum DC load current.
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The company PureNSafe is designing a portable, solar-powered disinfection system for Army use only. The system is simply an inlet pipe, a pump, a mixing chamber and an outlet pipe. The water is continuously pumped into the chamber where it is irradiated with UV light before it exits through the the appropriate tube into a collection vessel. The disinfection rate constant rate of disinfection with UV light is 7.80 s.1 and the amount of bacteria has to be reduced by 99.9%. be reduced by 99.9%. Since the Army requires an object that can be carried in a backpack, it requires that the chamber of the apparatus must not hold a capacity greater than 2 L. How much water will the system be able to produce during 10 hours of sunshine?
Solution :
The treatment system will operate as the well mixed chamber.
Disinfection rate constant for the UV light, k is 7.80 /s. Number of bacteria in water need to be reduced by 99.9%
Percent reduction of bacteria should be \($(1-10^{0.99}) \times 100 =89.7\%$\)
Volume of the unit chamber is fixed at 2L
Assume the inlet concentration, \($C_0$\) as 1000
The outlet concentration of bacteria, C should be \($1000-\left(1000 \times \frac{89.7}{100}\right)$\)
= 103
The well mixed chamber will then follow a completely mixed flow reactor model.
Compute the time required :
\($t=\frac{1}{k}\left(\frac{C_0}{C}-1\right)$\)
\($t=\frac{1}{7.8}\left(\frac{1000}{103}-1\right)$\)
= 1.115 s
Flow through the system is \($\frac{2 \ L}{1.115 \ s}$\) = 1.79 L/s
The amount of water treated during the 10 hours of sunlight is 1.79 x 10 x 60 x 60 = 64440 L
Which of the following did Dropbox implement after a series of security snafus in 2011 and 2012?
a. firewall
b. SSL/TLS
c. two-factor authentication
d. anti-virus software
Dropbox implemented the two-factor authentication feature after a series of security snafus in 2011 and 2012. The two-factor authentication feature is used for an extra layer of security to prevent unauthorized access.
After a series of security incidents in 2011 and 2012, Dropbox implemented several measures to enhance its security. One of the measures they implemented was two-factor authentication (2FA). This added an extra layer of security by requiring users to provide an additional verification step, typically a code sent to their mobile device, in addition to their password when logging into their accounts. Two-factor authentication helps protect against unauthorized access, even if the password is compromised.
While it is likely that Dropbox also implemented other security measures, such as firewalls and anti-virus software, specific information about those measures being implemented as a direct response to the security snafus is not readily available. However, SSL/TLS (Secure Sockets Layer/Transport Layer Security) was likely already in use by Dropbox even before the security incidents as it is a common security protocol used for encrypting data transmitted over the internet.
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The design tensile strength phi rnt of one bolt, 5/8 inch in
diameter A325 (Group A) is equal to:
18.6 kips
33.5 kips
48.9 kips
or 20.7 kips
The design tensile strength phi rnt of one bolt, 5/8 inch in diameter A325 (Group A) is equal to 18.6 kips which is in first option as design tensile strength φRnt of a bolt refers to the maximum tensile load that the bolt can withstand before failure.
It's important to note that the design tensile strength may vary depending on factors such as the bolt size, material grade, and specific application requirements. Therefore, it is crucial to consult relevant design codes and standards, such as the American Institute of Steel Construction (AISC) specifications, for accurate and up-to-date information on bolt design and strength.
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using data in Appendix A ,calculate the number of atoms in 1 tonne of iron
\(1.0783*10^{28}(atoms).\)
Explanation:Since I don't have access to "Appendix A", I'll solve the problem using data from the periodic table.
1. Determine the molar mass of iron.
According to the periodic table, the molar mass of iron is:
55.845g/mole.
2. Convert 1 tonne to grams.\(1(tonne)*1000=1000kg\\1000kg*1000=1000000g=10^6g\)
3. Apply rule of 3.\(55.845g\) ----------- \(1 mole\)
\(10^6g\) ----------- \(x\)
\(x=\frac{10^6*1}{55.845}=17906.7061(moles)\)
4. Determine the amount of atoms.Considering that there are, approximately, \(6.022*10^{23}\) atoms in a mole of any element, apply another rule of 3.
1 mole --------------------- \(6.022*10^{23}(atoms)\)
\(17906.7061(moles)\) --------------------- x
\(x=\frac{17906.7061*6.022*10^{23}}{1}=1.0783*10^{28}\).
1. An access control system controls access to area restricted area or facility using physical and computer-related devices, equipment along with ___.
An access control system controls access to area restricted area or facility using physical and computer-related devices, equipment along with authentication and authorization mechanisms.
A city of 200,000 people deposits 37 m3/s of sewage having a BOD of 28.0 mg/L and 1.8 mg/L of DO into a river that has a flow rate of 250 m3/s and a flow speed of 0.5 m/s. Just upstream of the release point, the river has a BOD of 3.6 mg/L and a DO of 7.6 mg/L. The saturation value of DO is 8.5 mg/L. The deoxygenation coefficient kdis 0.61/day and the reaeration coefficient kr is 0.76/day. Assuming complete and instantaneous mixing of the sewage and river find a. The initial oxygen deficit and ultimate BOD just downstream of the outfall b. The time and distance to reach the minimum DO c. The minimumDO d. The DO that could be expected 10 miles downstream
Answer:
Explanation:
a. The initial oxygen deficit can be calculated as:
ODI = (DOsat - DOupstream) + (BODinflow / kD)
ODI = (8.5 - 7.6) + (28.0 / 0.61)
ODI = 22.0 mg/L
The ultimate BOD just downstream of the outfall can be calculated as:
BODultimate = (ODI * kD) + BODinflow
BODultimate = (22.0 * 0.61) + 28.0
BODultimate = 41.42 mg/L
b. The time and distance to reach the minimum DO can be calculated using the Streeter-Phelps equation:
DO = DOsat - (DOsat - DOupstream) * e^(-krt) - (BOD / kD) * (1 - e^(-kdt))
Setting DO to the minimum value of 1.8 mg/L, we can solve for the time and distance:
1.8 = 8.5 - (8.5 - 7.6) * e^(-0.76t) - (41.42 / 0.61) * (1 - e^(-0.61t))
t = 7.05 days
d = v * t
d = 0.5 * 86400 * 7.05
d = 30,096 m
c. The minimum DO can be calculated by substituting the time and distance values into the Streeter-Phelps equation:
DO = 8.5 - (8.5 - 7.6) * e^(-0.767.05) - (41.42 / 0.61) * (1 - e^(-0.617.05))
DO = 1.26 mg/L
d. The DO that could be expected 10 miles downstream can be estimated by assuming complete mixing and using the Streeter-Phelps equation with a distance of 10 miles:
d = 16093.4 m
DO = 8.5 - (8.5 - 7.6) * e^(-0.76*(d/v)) - (BODinflow / kD) * (1 - e^(-kD*(d/v)))
DO = 6.29 mg/L
Measuring the current flow required by a horn requires that the ammeter be connected to the circuit
_____ and the horn button be depressed by an assistant.
Answer:
hi there I have attached my resume for your reference and hope to see you all there are other
Explanation:
hi apner name ki and I like the country studies
The home inspector should measure the _____ depth of insulation observed at the unfinished attic floor.
The home inspector should measure the approximate average depth of insulation observed at the unfinished attic floor.
What is insulation?This is known to be a kind of material that is often used to bring to a stop the flow or linking of electricity, heat, or sound from a given conductor to another.
Note that the home inspector should measure the approximate average depth of insulation observed at the unfinished attic floor as that is the bet thing to do.
See options below
exact
approximate average
measured exact
approximate weighted
measured average
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function of a regulator
Answer:
the function of the regulator in a power supply:-
A voltage regulator is a component of the power supply unit that ensures a steady constant voltage supply through all operational conditions. It regulates voltage during power fluctuations and variations in loads. It can regulate AC as well as DC voltages.
Explanation:
(❁´◡`❁)
Answer:-
The power of regulators to grant significant benefits to, or impose restrictions or penalties on, members of the public – and the extra profits to be gained from avoiding regulations – increases the risks of corruption. Regulators also have a role in collecting and protecting government revenue.
will the stock rods always meet the length constraint? explain.
Stock rods are the original connecting rods that come with an engine from the manufacturer. The length of the stock rods is an important factor in determining the engine's performance. The length constraint refers to the specific measurement requirements for the rods, which must be within a certain range to ensure optimal engine function.
Whether or not the stock rods will always meet the length constraint depends on a few factors. Firstly, it depends on the engine's design and the manufacturer's standards. If the engine has been designed with a strict focus on meeting specific length constraints, then it is likely that the stock rods will meet these requirements. However, if the manufacturer prioritizes other factors over strict length constraints, the stock rods may not always meet these measurements.
Additionally, wear and tear on the engine can cause the rods to become warped or otherwise damaged, which can affect their length and ability to meet length constraints. In conclusion, while stock rods are typically designed to meet length constraints, this may not always be the case depending on the engine's design and any damage that may occur over time.
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Select the correct answer.
Which of these scenarios depicts unethical workplace practice by an employee?
A.
monitoring employee movement during working hours
B. monitoring use of workplace resources
C. restricting Internet use
D. revealing confidential data
Reset
Next
Answer:
D
Explanation:
Confidential data is not supposed to be shared amongst others.
Answer:
D.
Explanation:
Revealing confidential data is illegal first of all. And second business isn't allowed to share info due to the confidentiality law. All the others aren't unethical, they are just precautions for the safety of other employees.
The mathematical model for finite element method in structural mechanics is the
O energy balance equation.
O equilibrium equation.
O conservation of velocity equation.
O none of these
Explanation:
Conservation of velocity equation
innovative ideas for civil engineering individual project? I'm running out of time. Need to submit and get approval for this. Please help me and give me a new title to research.
For an egsample- Investigation of replacing Ricehusk instead of Sand in C30, Like wise
Answer:
Top Final year projects for civil engineering students
• Geographic Information System using Q-GIS. ...
• Structural and Foundation Analysis. ...
• Construction Project Management & Building Information Modeling. ...
• Tall Building Design. ...
• Seismic Design using SAP2000 & ETABS.
Explanation:
Hope it's help
What is the primary tool material used for CNC turning?
----------------------------------------------------------------------------
Define:
a) Saturated liquid
b) Saturated steam
c) Overheated steam
d) Compressed liquid
e) Critical point
Functions and Design requirements• Select one device of your preference and write a primary function and at least 3 design requirements
I will select a smartphone as the device of my preference.
Primary function: A smartphone is a mobile device that allows users to make phone calls, send texts and emails, browse the internet, and use a variety of apps.
Design requirements:Durability: The device should be able to withstand everyday wear and tear, such as being dropped or bumped.
Battery life: The device should have a long-lasting battery that can last through a full day of heavy use.
Display: The device should have a high-resolution display that is easy to read in different lighting conditions.
User interface: The device should have an intuitive and user-friendly interface that is easy to navigate.
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As the length of a welding cable increases, the amount of
resistance decreases.
True
False
Answer:
False
Explanation:
Resistance occurs when the flow of charge through a wire is hindered. Resistance of flow of charge increases where the cable length increases .In a longer cable the charge carriers and the atoms in the cable collide more resulting to higher resistance.
The correct answer choice is: False.
The first answer is incorrect because resistance to flow of charge in a cable has a direct relation with length of cable in that increase in length of conducting cable will result to increase in resistance to flow of charges through the cable, not decrease in resistance.
It is desired to obtain 500 VAR reactive power from 230 Vrms 50 Hz 1.5 KVAR reactor. What should be the angle of the AC to AC converter to be used? Calculate the THD of the current drawn from the mains (consider up to the 12th harmonic)?
Answer:
14.5° ; THD % = 3.873 × 100 = 387.3%.
Explanation:
Okay, in this question we are given the following parameters or data or information which is going to assist us in solving the question efficiently and they are;
(1). "500 VAR reactive power from 230 Vrms 50 Hz 1.5 KVAR reactor".
(2). Consideration of up to 12th harmonic.
So, let us delve right into the solution to the question above;
Step one: Calculate the Irms and Irms(12th) by using the formula for the equation below;
Irms = reactive power /Vrms = 500/230 = 2.174 A.
Irms(12th) = 1.5 × 10^3/ 12 × 230 = 0.543 A.
Step two: Calculate the THD.
Before the Calculation of the THD, there is the need to determine the value for the dissociation factor, h.
h = Irms(12th)/Irms = 0.543/ 2.174 = 0.25.
Thus, THD = [1/ (h)^2 - 1 ] ^1/2. = 3.873.
THD % = 3.873 × 100 = 387.3%.
Step four: angle AC - Ac converter
theta = sin^-1 (1.5 × 10^3/ 12 × 500) = 14.5°.
Air is a....
O Solid
O Liquid
O Gas
O Plasma
Answer:
Air is a gas
Explanation:
i think. beavuse it cant be a liqued or a solid. i dont think a plasma. i would answer gas
A transparent film is to be bonded onto the top surface of a solid plate inside a heated chamber. For the bond to cure properly, a temperature of 70°C is to be maintained at the bond, between the film and the solid plate. The transparent film has a thickness of 1 mm and thermal conductivity of 0.05 W/m·K, while the solid plate is 13 mm thick and has a thermal conductivity of 1.2 W/m·K. Inside the heated chamber, the convection heat transfer coefficient is 70 W/m2·K. If the bottom surface of the solid plate is maintained at 52°C.
Required:
Determine the temperature inside the heated chamber and the surface temperature of the transparent film. Assume thermal contact resistance is negligible.
Answer:
1.) 103.23 degree centigrade
2.) 126.96 degree centigrade
Explanation:
Given that a transparent film is to be bonded onto the top surface of a solid plate inside a heated chamber. For the bond to cure properly, a temperature of 70°C is to be maintained at the bond, between the film and the solid plate. The transparent film has a thickness of 1 mm and thermal conductivity of 0.05 W/m·K, while the solid plate is 13 mm thick and has a thermal conductivity of 1.2 W/m·K. Inside the heated chamber, the convection heat transfer coefficient is 70 W/m2·K. If the bottom surface of the solid plate is maintained at 52°C.
To determine the temperature inside the heated Chamber, let us first calculate the heat transfer rate per unit area through the plate by using the formula
Heat transfer rate R = k( Tb - T2)/L
Where
k = 1.2 W/mA.K
Tb = 70 degree
T2 = 52 degree
L = 13mm = 13/1000 = 0.013m
substitute all the parameters into the formula above.
R = 1.2 x ( 70 - 52 )/ 0.013
R = 1.2 x (18/0.013)
R = 1661. 5 W/m^2
the surface temperature of the transparent film will be
Ts = Tb + (RLf/Kf)
Ts = 70 + (1661.5 x 0.001)/0.05
Ts = 70 + (1.6615)/0.05
Ts = 70 + 33.23
Ts = 103.23 degree centigrade
the temperature inside the heated Chamber will be calculated by using the formula
Ti = Ts + (R/h)
Ti = 103.23 + (1661.5/70)
Ti = 103.23 + 23.74
Ti = 126.97 degree centigrade