what are the earliest invention in human history​

Answers

Answer 1

Answer: Tools, Boats, Hand made bricks.

Explanation: The tools were the first technological advancement, the boats were the next, them hand made bricks for construction.

Answer 2
1605:newspapers
1608:telescope
1620:Compound microscope
1630:Slide rule
1642:mechanical calculator 1643:barometer
1650:vacuum pump
1656:pendulum clock

Hope this is enough

Related Questions

What will be the result from running the following program? print grades print 92 print 80print total print 92+80

Answers

Answer:

Grades

92

80

Total

92 + 80

Explanation:

When utilizing quotations, you enable to code to print what wrote, as it is. So, instead of adding the 92 + 80, it's printed out.

I hope this helped!

Good luck <3

paragraph on how atms work

Answers

ATM (Automatic Teller Machine) is a banking terminal that accepts deposits and dispenses cash. ATMs are activated by inserting cash (in cases of ATM Depositing) or debit /credit card that contain the user's account number and PIN on a magnetic stripe (for cash withdrawals)

Proper numeric keyboarding technique includes all of these techniques except
O keeping your wrist straight
O resting your fingers gently on the home keys
O looking at the keys
O pressing the keys squarely in the center

Answers

The answer is looking at the keys

Answer: Its the 1st choice, 2nd choice, and the final one is the 4th one. (NOT the third answer choice)

Explanation: (I just took the test)... Hopefully this helps and good luck.

A general rule for printing is to use _____ fonts for headlines and serif fonts for body text. sans-serif fantasy cursive monospace

Answers

Answer:

sans-serif

Explanation:

Fonts can be defined as a graphical representation of texts which includes a collection of characters such as numbers, letters, symbols etc in various size, color, typeface, design or weight.

A general rule for printing is to use sans-serif fonts for headlines and serif fonts for body text. This ultimately implies that, for any printed work such as novels, books, newspapers etc, it is a general rule for a printer to use sans-serif fonts for headlines and serif fonts for body text in order to enhance readability.

Also, it can be reversed in some instances by using a serif font for headlines and a sans-serif font for the body of a text.

if you exit a program without saving the document on which you are working, or the computer accidentally losses electrical power, the document will be lost

Answers

Depends on which program you are using. Some programs automatically save your work, even if you exit out of it or turn off your computer

Which of the following statement about device formatting is FALSE?
A) Device manufacturers store the initial file-system data structures in the device.
B) Operating system can create multiple partitions with in a single device.
C) Volume creation is implicit when a file system is placed directly within a partition.
D) Not every partition contains a copy of the operating systems.

Answers

Answer:

The correct option is;

A) Device manufacturers store the initial file-system data structures in the device.

Explanation:

Before a storage device can be used for data storage, it is required to prepare the device for use and to make the device to become visible to the operating system by formatting of the device

New storage devices are not pre-formatted or come with a ready to use file system as there are different file systems specifically designed for particular  operating systems or operating environment.

Formatting creates partitions, makes the hard drive visible to the operating system and creates a file system that is new such that the storage device can be used for storing files.

How many pins are in the power supply connector that is typically used on most motherboards today?

Answers

Answer: 4 pins

Explanation:

Answer: 20+4 ATX pins.

Explanation: If you’re talking about supplying power from the PSU to the Motherboard then it would be the 20+4 pin connector. Back on old ATX motherboards it used to be the 20 pin connector.

5. Which one of the following best defines a network server?
O A A type of network system that provides resources to network clients
B A type of system where all devices on the network are clients
C A type of network with one server and multiple clients
O D A type of device that connects all all other network devices together

Answers

Answer:

i thank it is B for the answer

Clicking and double-clicking are two of the five

Answers

Answer:

The correct answer is events

Today technology is based in Science and engineering, earlier it was based on
__________ _____-_____.

Answers

Answer:

Technical know-how

Explanation:

How can you say that a computer is a versatile machine?​

Answers

Answer:

A computer is a versatile machine because is used for many purposes,a modern day computer can run multiple data at once making a fast and efficient machine very durable and effective for our use in all areas of life.

How many bits are reserved for the Transmission Control Protocol (TCP) flags?

Answers

It’s 6 bits are reserved for the 6 TCP control flags. A connection, at which layer, implies that every segment of data sent is acknowledged? transport; A connection at the transport layer implies that every segment of data sent is acknowledged.

Which of the following is used to encrypt web application data?
a. MD5
b. AES
c. SHA
d. DHA

Answers

Answer:

b. AES

Explanation:

AES is an acronym for Advanced Encryption Standard and it is a cryptographic or symmetric block cipher that is based on a substitution-permutation network (SPN) used for the encryption of sensitive data over the internet or web. AES uses a key length of 128, 192 or 256 bits and a block length of 128 bits to encrypt data on web applications.

It is an encryption standard of the government of the United States of America and is supported by the National Institute of Standards and Technology (NIST).

Hence, AES is used to encrypt web application data and it uses an algorithm developed by Vincent Rijmen and Joan Daemen, known as the Rijndael algorithm.

$8.25/hour; _____$/year, when working 40 hours a week.

Answers

if you work 50 weeks/year and 40 hours/week, you will make 16,500 dollars per year if you make 8.25 per hour

Web pages are accessed through a software program called a _____.A) ​web crawlerB) ​web browserC) ​web serverD) ​web app drawer

Answers

Answer: B) ​web browser

Explanation: A web browser may be explained as a software program or application available on various operating systems such as windows, Mac, Android, iOS among others. This program acts as an interface between information available on websites or pages and users. This application takes a specified uniform resource locator or web address as input and outputs the information available on a web page. Google Chrome, Internet Explorer, Microsoft edge, opera mini, Safari, Firefox and so on.

Egyptian hieroglyphs were part of a writing system used by the ancient Egyptians. What type of graphic design elements did they contain?

Answers

Answer:

Logographic, syllabic, and alphabetic elements. I think thts what u were asking for?

Explanation:

What do you think is the single greatest physical threat to information systems? Fire? Hurricanes? Sabotage? Terrorism? Something else? Discuss this question and provide support for your answer.

Answers

Answer:

The single greatest physical threat to information systems is:

Sabotage

Explanation:

Sabotage describes the efforts of internal persons to ensure that a system does not operate as intended or is destroyed.  Among the threats to information systems, this is the greatest.  The problem with sabotage is that the operators are internal, they know the system very well.  They understand the weak points and the strengths of the system.  They are internal terrorists to any information system.  These internal saboteurs are capable of using any means to achieve their purpose.  Therefore, it is necessary to scrutinize employees from time to time to discover internal risks.

An ISP is considering adding additional redundant connections to its network. Which of the following best describes why the company would choose to do so?

Answers

Answer:

Redundant networks are generally more reliable.

Explanation:

The complete question is in this brainly link;

https://brainly.com/question/18302186

This is based on knowing the importance of a redundant network.

C. Redundant networks are more reliable

A redundant network is one that helps to increase the reliability of a computer system.

Now, this is possible because the more critical the ISP NETWORK is, the more important it will be for the time it takes to resolve from a fault would be reduced.

This implies that, by adding one redundant device to their connection, the time it will take to resolve from a fault would be drastically reduced and this will lead to a far more reliable system.

Thus, redundant networks are more reliable.

Read more at; brainly.com/question/17878589

C++ code pls write the code

Answers

Answer:

Following are the code to this question:

#include<iostream>//defining header file

using namespace std;

class vec//defining class vec  

{

int x, y, z; //defining integer varaible x, y, z

public: // using public access specifier

vec() //defining default constructor

{

   x = 0; //assign value 0 in x variable  

   y = 0; //assign value 0 in y variable

   z = 0;//assign value 0 in z variable

}

vec(int a, int b , int c) //defining parameterized constructor vec

{

   x = a; //assign value a in x variable

   y = b; //assign value b in y variable

   z = c;//assign value c in z variable

}

void printVec() //defining a method printVec

{

   cout<<x<<","<<y<<","<<z<<endl; //use print method to print integer variable value

}

//code

vec& operator=(const vec& ob) //defining operator method that create object "ob" in parameter  

{

x=ob.x; //use ob to hold x variable value

y=ob.y;//use ob to hold y variable value

z=ob.z;//use ob to hold z variable value

return *this;//using this keyword to return value  

}

};

int main()//defining main method

{

vec v(1,2,3);//calling parameterized constructor

vec v2; //creating class object to call method

v2=v; //creatring reference of object

v2.printVec(); //call method printVec

return 0;

}

Output:

1, 2, 3

Explanation:

In the above-given code part, a method "operator" is defined, that accepts an object or we can say that it is a reference of the class "ob", which is a constant type. Inside the method, the object is used to store the integer variable value in its variable and use the return keyword with this point keyword to return its value.    

What benefits does the Domain Name System (DNS) provide? Check all that apply.
Network Address Translation (NAT)
Ease of address memorization
Assigning Internet Protocol (IP) addresses
Easy mapping to a new Internet Protocol (IP) address

Answers

Answer:

Option C (Assigning Internet Protocol (IP) addresses) is the correct choice.

Explanation:

DNS is a centralized process for resolving as well as continuing to give IP addresses for something like a specified domain name, a method that allows you to search a site via your web browsers whenever you tab or switch on any web server (Internet Explorer, chrome, respectively.).This helps everyone to still have throughput mostly on the network although one of the databases becomes offline for maintenance.

All other options are not relevant to the situation in question. It is the right answer to all of the above.

Answer:the TCP

Explanation:

How has technology influenced space exploration?

Answers

Answer:

One of the biggest benefits of machine learning when it comes to space exploration is that programs can sift through the available data more easily than humans, which increases the chance of finding planets just by looking at datasets. It's even thought that AI could be instrumental in locating extra-terrestrial life.

Explanation:

Write a program that performs the following tasks: Display a friendly greeting to the user Prompt the user for the value to convert (a String) Accept that String Prompt the user for the value of the initial base (an integer) Accept that integer Prompt the user for the desired base of the output (an integer) Accept that integer If the String is not a legal expression of a number in the initial base, display an error message and exit the program. Convert the value represented by the String in the initial base to the desired base. Display the result.

Answers

Explanation:

import java.util.Scanner;

import java.math.BigInteger;

public class Main

{

private int x;  

public static boolean isValidInteger(String theValue, int theBase)

{    

BigInteger number = new BigInteger(theValue,theBase);

if(theValue.equals(number.toString(theBase)))

{

return true;

}

else

return false;

}

public static String convertInteger(String theValue, int initialBase, int finalBase)

{

boolean valid=isValidInteger(theValue,initialBase);

if(valid==true)

{

BigInteger number = new BigInteger(theValue);

return(number.toString(finalBase));

}

else

return("String not in initial base");  

}

public static void main(String[] args)

{

System.out.println("Welcome");

String value;

int ibase, dbase;

if(args.length==0)

{

Scanner S = new Scanner(System.in);

System.out.println("Enter Value to be converted :: ");

value = S.nextLine();

System.out.println("Enter initial base :: ");

ibase = S.nextInt();

System.out.println("Enter desired base :: ");

dbase = S.nextInt();

}

else

{

value=args[0];

ibase=Integer.parseInt(args[1]);

dbase=Integer.parseInt(args[2]);

}

  System.out.println("Change base "+convertInteger(value,ibase,dbase));  

}

}

Output

What device to use when downloading a large file?

Answers

Pc is a device to downloading load file

Write a program that prompts the user to input an integer that represents the money in cents. The program will the calculate the smallest combination of coins that the user has. For example, 42 cents is 1 quarter, 1 dime, 1 nickel, and 2 pennies. Similarly, 49 cents is 1 quarter, 2 dimes, and 4 pennies

Answers

Answer:

The program in Python is as follows:

cents = int(input("Cent: "))

quarter = int(cents/25)

if quarter > 1:

     print(str(quarter)+" quarters")

elif quarter == 1:

     print(str(quarter)+" quarter")

cents = cents - quarter * 25

dime = int(cents/10)

if dime>1:

     print(str(dime)+" dimes")

elif dime == 1:

     print(str(dime)+" dime")

cents = cents - dime * 10

nickel = int(cents/5)

if nickel > 1:

     print(str(nickel)+" nickels")

elif nickel == 1:

     print(str(nickel)+" nickel")

penny = cents - nickel * 5

if penny > 1:

     print(str(penny)+" pennies")

elif penny == 1:

     print(str(penny)+" penny")

Explanation:

This line prompts user for input in cents

cents = int(input("Cent: "))

This line calculates the number of quarters in the input amount

quarter = int(cents/25)

This following if statement prints the calculated quarters

if quarter > 1:

     print(str(quarter)+" quarters")

elif quarter == 1:

     print(str(quarter)+" quarter")

cents = cents - quarter * 25

This line calculates the number of dime in the input amount

dime = int(cents/10)

This following if statement prints the calculated dime

if dime>1:

     print(str(dime)+" dimes")

elif dime == 1:

     print(str(dime)+" dime")

cents = cents - dime * 10

This line calculates the number of nickels in the input amount

nickel = int(cents/5)

This following if statement prints the calculated nickels

if nickel > 1:

     print(str(nickel)+" nickels")

elif nickel == 1:

     print(str(nickel)+" nickel")

This line calculates the number of pennies in the input amount

penny = cents - nickel * 5

This following if statement prints the calculated pennies

if penny > 1:

     print(str(penny)+" pennies")

elif penny == 1:

     print(str(penny)+" penny")

When does the VB.NET programming environment start to operate?
A. once a VB.NET project is compiled
B. once a VB.NET project is created in the Microsoft Visual Studio environment
C. once a VB.NET project is debugged
D. once a VB.NET project folder is opened
E. All of the above are correct

Answers

Answer:

B. once a VB.NET project is created in the Microsoft Visual Studio environment.

Explanation:

Visual Basic . Net is a programming language which is used to run complex software and projects. The VB projects which are created in Microsoft Visual Studio are run by console application. These computer applications run complex and technical software.

Discuss the main characteristics of the database approach and how it differs from traditional file systems.

Answers

The database system allows the creation of a single depository of information, which is updated periodically and which can be used simultaneously by many users, since this type of system allows the effective sharing of all data stored in its depository . In addition, this is a secure system and is very difficult to break into. This is because of the efficiency of the software used to maintain it. However, the use of these softwares can be a little complicated for users, in addition to requiring a high economic cost to obtain them.

The traditional file system, in turn, each user must obtain their own file related to the application they want to run. This may seem dull in comparison to the database, but it is advantageous as it does not require any spending on software, as it is simple and there are several cheap and efficient tools and editors on the market. However, this system is not so safe, it can cause isolation of data and even data inconsistency, which disrupts the entire system.

One of the simplest and best known polyalphabetic ciphers is _________ cipher. In this scheme, the set of related monoalphabetic substitution rules consists of the 26 Caesar ciphers with shifts of 0 through 25. Each cipher is denoted by a key letter which is the ciphertext letter that substitutes for the plaintext letter a.

Answers

Answer:

Vigenere

Explanation:

Vigenere Cipher is an encryption method of alphabetic symbols that utilizes an easy form of polyalphabetic exchange which is carried out through Vigenere table.

Hence, in this situation, the correct answer is VIGENERE Cipher because it is the form of cipher whereby the set of related monoalphabetic substitution rules comprises of the 26 Caesar ciphers with shifts of 0 through 25. Each cipher is indicated by a key letter which is the ciphertext letter that substitutes for the plaintext letter.

Recursion is a natural use for a _____ (stack or queue)

Answers

Answer:

Stack

Explanation:

Any function that call itself can be regarded as recursive function, it should be noted that Recursion is a natural use for a stack, especially in the area of book keeping.

Recursion is very important because some of problems are usually recursive in nature such as Graph and others, and when dealing with recursion , only base and recursive case is needed to be defined.

Some areas where recursion is used are in sorting and searching.

Students who respond promptly to e-mails are following which netiquette rule?

A. keeping content appropriate
B. assessing an online environment
C. respecting everyone’s time
D. practicing ethical behaviors

Answers

Answer:

respecting everyone's time

Explanation:

they don't make people wait for a response

Its Option C - Respecting Everyone’s Time.
Thank you!

What makes Java platform independent?

Answers

Answer:

Java it is the use of Byte code that makes it platform independent.

Explanation:

Java platform independent language allows its the end users to access they source code and other language automatically,its a human readable language.

Java is created in the James Gosling at the sun micro systems,and java is an open source programming language, generally the people refer the java because its source connections.Java code may be use sequence of machine that can be use executed by the directly CPU,and all the program in java are compiled by java c.Java is an independent platform and variety of methods, its object oriented language, and java is study platform.Java program are compiled into byte code and that byte code is platform independent, and they machine execute the byte code the java virtual machine.Java is the platform independent because it does not depend on the type of platform,and the virtual machine also interpret the representations.Java compiler is the .class file or the byte code and the machine native code,java is that depend on java virtual machine.Java is does not required any licence to the run and they also reliable platform to work on.

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2)Which expression is equivalent to 4 to the 9th power and 4 to the 0 power a. 4 to the 8th power b. 4 to the 0 power C. 4 to the 7 power d. 4 to the 9 power The basic unit of the structure and function of livingthings is the ____ What is 1+6 idk know what is it I need help Which polynomial functions are written instandard form? Select all that apply.f(x) = 8-25f(x) = -3.25 + 5x 2f(x) = 2x5 + 2x + x3f(x) = x3 - 8x2 A square has an area of 145.7 square feet. To the nearest integer, what is the length of one side? The Age of Exploration changed the focus of trade in Europe to the exploration of the Mediterranean Sea. o True o FalsePlease Help will give brainliest! *IF RIGHT* How did the structure of the Christian Church change after the Council of Nicaea? How do the coefficients in a balanced equation compare quantities of twosubstances?O A. The ratio of the coefficients equals the ratio of the masses of thesubstancesO B. The sum of the coefficients of the reactants equals the sum of theproductsO C. The ratio of the substances' coefficients equals the ratio of theirnumber of moles.OD. The coefficient of the reactant tells how many product moleculeswill form. 5+3(-x-9)+ 4x 2(5x-1) graphic designer develops a campaign poster for a politician. The purpose of this art is _______. Tundra is known for itsa. sparse precipitation and extreme cold temperaturesb. sparse precipitation and mild wintersc. coniferous forestsd. heavy rainfall and extreme cold temperatures PLEASE HELP MEFactor the common factor out of each expression 2) 7b + 28b I will mark you brainliest! Just please help me! Find the approximate side length of a square game board with an area of 161 in? ERROR ANALYSIS In Exercises 31 describe andcorrect the error in finding the distance betweenA(6,2) and B(1,-4).31.XAB = (6 - 1)^2 + [2-(-4)]^2=5^2 + 6^2= 25 + 36= 61 4. A train traveled 300 miles in 2.5 hours. At this rate, how far would the train travel in 9 hours?HELP PLEASE A five-pound bag of flour costs $2.90 and holds 10 cups. How much willit cost for two-and-one-quarter cups of flour? what is alpha decay? An airplane can fly at a rate of 600 miles per hour. How fast does an airplane travel per minute? Remember, there are 60 minutes in an hour. Leena consumes 400 calories at breakfast and 350 calories at lunch. She consumes StartFraction 2 Over 3 EndFraction. of her daily calories at dinner. If x represents the calories consumed at dinner, which statements describe the situation? Check all that apply.Leena consumed 1,500 calories at dinner.The equation StartFraction 2 Over 3 EndFraction left-parenthesis x plus 400 plus 350 right-parenthesis equals x.(x + 400 + 350) = x can be used to model the situation.Leena consumed 500 calories at dinner. The equation StartFraction 2 Over 3 EndFraction left-parenthesis x right-parenthesis equals x left-parenthesis 400 plus 300 right-parenthesis.(x) = x(400 + 300) can be used to model the situation.Leena consumed 1,000 calories at dinner. The equation StartFraction 2 Over 3 EndFraction x left-parenthesis x plus 400 plus 350 right-parenthesis equals x.x(400 +