Using a person's email address as their primary key is not a good rule to follow when developing a database model.
A primary key is a unique identifier for each record in a database table. It is used to ensure the integrity and uniqueness of data within the table. When choosing a primary key, it is important to select a stable and unchanging attribute that uniquely identifies each record. While email addresses can be unique, they are not stable as they can change over time. If a person changes their email address.
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who developed vacuum tube and when?
Answer:
In 1904, John Ambrose Fleming invented the first vacuum tube.
Explanation:
Page No
Date T 1 1
Ist
ament Write a program in java to find the area and
perimeter of right angled triangle by using function argument.
Answer:
ila bgfffsg hqhffa hhfw ygga gha yqvvty1uh' fttyavt h5tfauv gtta76rq
Determine if true or false Goal Seek immediately attempts to apply the function to the adjacent cells.
Answer:
The answer is "False".
Explanation:
This function the part of Excel, that allows a way to resolve the desirable result by manipulating an underlying expectation. This function is also called What-if-Analysis, which is used to test, and an error approach to address the problem by linking guesses before the answer comes. On the Data tab, throughout the Data Tool category, and select Target Check it provides a reference that includes a formula to also be solved throughout the Set cell box.
Choose the correct qurey to remove a record with names "John" in the persons table
(a) Delete from persons where name="John";(b) Delete from table1 where name="John";(c) Delet from persons where name="John";(d) Delet from persons where name="Alex";
Answer:
a
Explanation:
The correct syntax would be:
DELETE FROM persons WHERE name='John'
i.e., use single quotes. Uppercase keywords is not required but preferred by many.
What are the basic parts of sewing machine?
Answer:
1. Spool Pin
Thread usually comes on a spool. That is the wooden thread holder you buy in the store. The spool pin holds the spool of thread for you making it easier for you to thread your machine and keep the thread coming as you want it to. Read about the spool pin felt.
2. Bobbin Binder Spindle
A bobbin is a little cylinder that may come with or without flanges. It holds the thread that is wound around it. The spindle is where the bobbin is placed during winding.
3. Bobbin Winder Stopper
The bobbin is only so large. It cannot always hold the amount of thread you want to put on it. This part stops the bobbin from collecting thread when it has reached full capacity.
4. Stitch Width Dial
On many newer sewing machines, you get a variety of stitch options to use. The purpose of this part is to control the zig-zag stitch option while you are busy concentrating on your sewing.
5. Pattern Selector Dial
This little dial allows you to select one stitch pattern out of the many that come built into your sewing machine. You just turn the dial to get the pattern that you want on your clothes and other fabrics you want to mend or create.
6. Hand Wheel
This is the manual needle control which raises or lowers the needle. It is usually located at the right-hand side of the machine. It shouldn’t be that hard to turn.
7. Stitch Length Dial
More recent sewing machines may have this part attached to them. Its purpose is to control the length of your selected stitch. This helps you stay in control of your sewing duties and make sure you get what you want and need.
8. Reverse Stitch Lever
Once you push this lever, you get to sew in the opposite direction. This function makes your sewing a little easier and faster to do because you can go forward or in reverse when you need to.
9. Power Switch
You already know what this switch does. The key to using it is to make sure you turned your sewing machine off before you walk away. Also, it should be located at the right side of your machine.
10. Bobbin Winder Thread Guide
When you activate this part on your sewing machine, you are guiding the thread towards the bobbin/ This makes winding your thread up a little easier and should prevent twists, tangles or caught thread.
11. Thread Tension Dial
Tension is important when you do your sewing. Too loose can cause you problems and too much tension could snap your thread and make sewing more time consuming as you have to re-thread the machine. This little part simply controls the tension on the thread so be careful when you use it.
12. Thread Take-Up Lever
Your top thread passes through this part as you do your sewing. The lever moves up and down with your needle so do not be alarmed that it is constantly moving.
13. Needle Clamp Screw
Needles do not stay in place by themselves. It would be nice if they did. You need this part to hold your needle where it is supposed to be. It also makes sure your needle is secure as it moves.
14. Presser Foot
This is the part that holds your fabric so it doe snot slip all over the place while you are working. Controlling your fabric is important while you do your sewing.
15. Bobbin Cover
Your sewing machine parts do need some protection to keep them in top working order and to help then last you for years. This is the job of the bobbin cover. It protects the bobbin as it covers it.
16. Bobbin Cover Release Button
Also, you need access to your bobbin when it its filled with thread or there is a problem. This release button helps you to remove the bobbin cover so you have complete access to your bobbin.
17. Feed Dog
It is an interesting name, but it has a very straightforward function., This part feeds your fabric through the sewing machine while you are sewing. This helps you concentrate on other sewing needs as you work.
18. Needle
Another self-explanatory label that tells you everything you need to know. The needle is an integral part of the sewing machine and without it, the other parts cannot do their job.
19. Needle Plate
This part is located right under the needle and an under the presser foot. Its job is to help move the fabric forward as you sew. It may help help push the fabric back when you use the reverse mode on your sewing machine.
Explanation:
a presentation is widely used to present ______ and ______ effectively
Answer:
a presentation is widely used to present beautiful and more effectively
Explanation:
hope it will help you :)
What are the main purposes of an operating system?
Answer:
An operating system has three main functions: (1) manage the computer's resources, such as the central processing unit, memory, disk drives, and printers, (2) establish a user interface, and (3) execute and provide services for applications software.
a c program to check the greaster number among the two entered number using if else statement
Answer:
#include <stdio.h>
int main(void) {
int number1, number2;
printf("Enter first number: ");
scanf("%d", &number1);
printf("Enter second number: ");
scanf("%d", &number2);
if (number1 > number2) {
printf("%d is greater than %d!", number1, number2);
} else if (number2 > number1) {
printf("%d is greater than %d!", number2, number1);
} else {
printf("%d is equal to %d!", number1, number2);
}
}
What is the name of tool
Answer:
bro the pic is hazy
Explanation:
but it is looking like octagon
hope it helps you
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Please help
Measure the thickness of a razor blade using a vernier caliper and screw gauge. What is the lowest count of these instruments? Which measuring
Instrument is more accurate? You can take multiple blades and stack them together, then measure thickness, and find out the average thickness.
Answer:
Is this question related to computers and technology?
A virus which deceive the user by acting as a legitimate file.
Answer:
A Trojan virus
Explanation:
It acts like a bona fide application or file to trick you. It seeks to deceive you into loading and executing the malware on your device
Question #5
Multiple Choice
What is used within an HTML tag for additional information?
O attribute
O anchor
O hyperlink
metadata
Answer: Attribute
Explanation: Attribute is used in HTML tags for additional information. Correct on Edg 2021.
Answer: attribute
Edge '23
Write the Python programs for the
following:
To input a number and check if it is
even or odd number
Answer:
num = int(input("Enter a number: "))
if (num % 2) == 0:
print("{0} is Even number". format(num))
else:
print("{0} is Odd number". format(num))
guys do you know any websites that rewrites you text so you don’t get plagiarism?
3.1.2 Quiz: What Can Information Technology Do for You? Question 8 of 10 What is one reason why a business may want to move entirely online? A. To double the number of employees B. To avoid paying state and local taxes C. To focus on a global market D. To limit the number of items in its inventory
Answer:
C. To focus on a global market
Explanation:
Information technology can be defined as a set of components or computer systems, which is used to collect, store, and process data, as well as dissemination of information, knowledge, and distribution of digital products.
An information technology interacts with its environment by receiving data in its raw forms and information in a usable format.
Generally, it is an integral part of human life because individuals, organizations, and institutions rely on information technology and systems in order to perform their duties, functions or tasks and to manage their operations effectively. For example, all organizations make use of information technology and systems for supply chain management, process financial accounts, manage their workforce, and as a marketing channels to reach their customers or potential customers.
Additionally, an information system or technology comprises of five (5) main components;
1. Hardware.
2. Software.
3. Database.
4. Human resources.
5. Telecommunications.
Hence, information technology or system relies on the data it receives from its environment, processes this data into formats that are usable by the end users.
One reason why a business may want to move entirely online is to focus on a global market through the use of social media platforms and networks to reach out to customers in various geographical location.
Which Creative Commons license type allows others to use and build upon work non-commercially, provided that they credit original author and maintain the same licensing?
Answer:
Creative Commons license type allows others to use and build upon work non-commercially, provided that they credit original author and maintain the same licensing is described below in detail.
Explanation:
Attribution-Non financially-ShareAlike
This permission lets others adapt, remix, and develop upon your work non-financially, as long as they charge you and license their new inventions under identical times. There are six separate license classes, scheduled from most to least licensed. the material in any mechanism or arrangement, so long as attribution is given to the originator.
which of the following can be represented by a sequence of bits. 1. An integer 2. An alphanumeric character 3. A machine language instruction
Answer:
all of them
Explanation:
In a computer program, this is how numbers, text and program instructions are stored.
Need help ASAP
Thankss + BRAINLIST only for correct answers
Answer:
The purpose to the user is to buy items online.
The purpose to the creator is to have a worldwide service chain to deliver packages.
Vising this website gives access to the items consumers need and allows them to get them shipped right to their door.
It was made so the creator can lots of money along with making a lot of jobs to slow the unemployment rate.
Explanation:
I pulled a lot of this from my head and reading about schollarships Amazon has for students. Amazon is a shopping website. Therefore the user can buy things and it gives the creator money along with making jobs for others.
how telecommunications works?
Answer:
Telecommunications are the means of electronic transmission of information over distances. The information may be in the form of voice telephone calls, data, text, images, or video. Today, telecommunications are used to organize more or less remote computer systems into telecommunications networks.
Explanation:
Jessica has two pens, one red pen and a black pen. The red pen measures 5 inches while the
black one measures 15.24 cenfimefers.
A) How long is Jessica's red pen in centimeters
B) How long is Jessica's black pen in inches
C) which pen is longer
2) John rode 2 kilometers on his bike. His sister Sally rode 3000 meters on her bike. Who rode the
fasthest and
A) How much did John ride in meters
B) How much did Sally ride in kilometers 2012
C) Who rode the farthesten
D) How much farther did they ride (in kilometers)?
E) How much farther did they ride (in meters)?
3) Faye drew two line segments. The first line segment measures 7 inches while the second measures
10 inches.
A) What is the length of the first line segment in centimeters
B) What is the length of the second line segment in centimeters?
branleast ka sakin pag sinagotan moto promise
pag hindi maayos yan report ka sakin
Answer:
1.
A) 12.7
B) 6
C) The black pen
2.
A) 2000
B) 3
C) Sally
D) They rode 1 kilometers farther
E) They rode 1000 meters farther
3.
A) 17.78
B) 25.4
Explanation:
A=5×2.54=12.7cmB.=15.24/2.54=6inchC.black pencilsalli rode a bike faster thanjohn.A.john ride bike in metre=2×1000=2000m
B.salli ride a bike in kilometre=3000/1000=3 km
C.salli rode a bike fastest.sorry i do not know d,e
3.A=7×2.54=17.78cmB.10×2.54=25.4cm
PLS HELP ASAP Which is NOT a component of a packet?
trailer (footer)
protocol
body (payload)
header
What are the three components of the fire triangle
Answer:
Fuel, oxygen, and heat.
Explanation:
REALLY EASY NEED HELP!! REWARD BRAINLIEST
Answer:
c
Explanation:
Answer: It is the first one
Explanation:
List out two ways to execute the script.
Answer:
1) Execute Shell Script Using File Name. Use the shell script file name to execute it either by using it's relative path or absolute path as shown below
2) Execute Shell Script Using Source Command.
Manipulating Images: Which aspect helps you to change the luminescence of your image?
Answer:
the aspect that help you change the luminescence of your image is iframe
Alice just wrote a new app using Python. She tested her code and noticed some of her lines of code are out of order. Which principal of programing should Alice review?
Hand coding
Line coding
Planning & Analysis
Sequencing
Answer:
Sequencing
Explanation:
I have taken the test
Write a program to allow user to perform any of these list operation given in a menu. The menu is: a) Append an element b) Insert an element c) Modify an existing element d) Delete an existing element with a given value e) Sort the list in descending order f) Display the list.
Answer:
c
Explanation:
How do computers multitask in an ideal situation?
a. slowly
b. every 30 seconds
c. manually
d.automatically
Answer:
Automatically
Explanation:
In an ideal situation, computers would multitask quickly and without human interference.
function of printer and speaker
Nepal .... Free Fire
I charge my stylus 2-3 hours a day. But after all the charging the battery only lasts for 5 minutes. I hope someone can rectify this issue for me. Thank you..
Answer:
Well if your charging it to 100% nd its only lasting 5 minutes it may be because you charger is getting old or is breaking. What model do you have (stylus)
Explanation: