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3 years ago

What new england industry quickly collapsed with the discovery of oil in pennsylvania

2 answers:

Elena-2011 [213]3 years ago

6 0

It was the whaling industry. Whaling use to be the main source of oil that was used for fuel and lighting in America which was based in the coastal communities of New England. It went into decline when oil was discovered in 1859. Eventually it replaced whale oil as a source of fuel and life.

leva [86]3 years ago

6 0

The answer is Whaling industry.

The 1st principle use of whale oil was in lighting lamps and as candle wax. Other uses came with time. The most common whale which was most sought for its oil was the sperm whale. This went on until the petroleum industry opened up in 1859 and by 1900, the whaling industry had collapsed. Mid 1850’s moving forward, the whale fishery was in a declining state before general refining of crude oil commenced from the western Pennsylvania oil fields through oil creek valley and elsewhere. The whaling industry also collapsed partly because of the civil war which began in April, 1861.

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Write the definition of the function inputArray that prompts the user to input 20 numbers and stores the numbers into alpha. Wri

Alina [70]

Answer:

In Java:

public static int[] inputArray(){

Scanner input = new Scanner(System.in);

int[] alpha = new int[20];

for(int i = 0;i<20;i++){

alpha[i] = input.nextInt();

}

return alpha;}

public static int[] doubleArray(int [] alpha){

int[] beta = new int[20];

for(int i = 0;i<20;i++){

beta[i] = 2 * alpha[i];

}

return beta;

}

public static int[] copyAlphaBeta(int [] alpha, int [] beta){

int [] AlphaBeta = new int[10];

for(int i = 0;i<5;i++){

AlphaBeta[i] = alpha[i];

}

int count = 5;

for(int i = 15;i<20;i++){

AlphaBeta[count] = beta[i];

count++;

}

return AlphaBeta;

}

public static void printArray(int [] alpha){

for(int i = 0;i<20;i++){

System.out.print(alpha[i]+" ");

if((i+1)%15 == 0){

System.out.println(" ");

}

Explanation:

The inputArray is defined here

public static int[] inputArray(){

Scanner input = new Scanner(System.in);

This declares alpha array of 20 elements

int[] alpha = new int[20];

The following iteration gets input from the user into the array

for(int i = 0;i<20;i++){

alpha[i] = input.nextInt();

}

This returns the alpha array

return alpha;}

The doubleArray is defined here. It takes the alpha array as its input parameter

public static int[] doubleArray(int [] alpha){

This declares beta of 20 integers

int[] beta = new int[20];

This populates beta by 2 * alpha[i]

for(int i = 0;i<20;i++){

beta[i] = 2 * alpha[i];

}

This returns the alpha array

return beta;}

The copyAlphaBeta array is defines here

public static int[] copyAlphaBeta(int [] alpha, int [] beta){

This declares AlphaBeta as 10 elements

int [] AlphaBeta = new int[10];

This populates the first 5 elements of AlphaBeta with the first 5 of alpha

for(int i = 0;i<5;i++){

AlphaBeta[i] = alpha[i];

}

int count = 5;

This populates the last 5 elements of AlphaBeta with the last 5 of beta

for(int i = 15;i<20;i++){

AlphaBeta[count] = beta[i];

count++;

}

This returns the AlphaBeta array

return AlphaBeta;

}

The printArray is defined here. It takes the alpha array as its input parameter

public static void printArray(int [] alpha){

This iterates through alpha array

for(int i = 0;i<20;i++){

This prints each element of the array

System.out.print(alpha[i]+" ");

A new line is started after the 15th element

if((i+1)%15 == 0){

System.out.println(" ");

}

}

See attachment for complete program which includes the main

Download txt

4 0

2 years ago

The user will input a three digit number

zlopas [31]

import java.util.Scanner;

public class U1_L5_Activity_One {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

System.out.print("Please enter a two digit number: ");

int x = scan.nextInt();

System.out.println("Here are the digits:");

System.out.println(x/100);

System.out.println((x/10)%10); //Just divide the result by 10 and find the remainder

System.out.println(x%10);

}

//Or, you can do that way:

import java.util.Scanner;

public class U1_L5_Activity_One {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

System.out.print("Please enter a two digit number: ");

String[] x = scan.nextLine().split(""); //We need it to be a string array, to split the values after "", that is, after each symbol(number)

System.out.println("Here are the digits:");

for(int i = 0; i<x.length; i++) {

System.out.println(Integer.parseInt(x[i])); //Converting the string into int, as you want

}

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2 years ago

Derek has an interest in designing video games. What requirements should he fulfill to be a game designer? To be a game designer

4vir4ik [10]

Answer:

2. Marketing, communication or advertising

Explanation:

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3 years ago

Using the Internet as interpersonal communication. Find a way to

Tomtit [17]

Answer:

Idk if an app is ok too but for an app there is one called monkey. my friend showed it me. you can meet a loy of new people on there. its a speed video call with everyone. I think you get 30 seconds and if you want to talk more then you just add time or add each other as friends

4 0

3 years ago

In this task, you will perform normalization on a crude table so that it could be stored as a relational database.

ryzh [129]

Answer:

Check the explanation

Explanation:

(1.) The functional dependencies based on assumptions are as follows:-

Trip determines which staff was there in the trip, the car used for the trip, the quantity of fuel used in the trip, the fill up time and the total paid of the trip.

Service station refers to its address

Car details consist of the details of license plate, odometer reading and the fuel type used in the car

fuel type and the fill up time will help to determine the cost of the fuel at that time

cost of the fuel and the quantity of fuel used will determine the total paid

From the above assumptions the functional dependencies are as follows:-

Trip ID -> Staff Name, Car Details, Service Station, Quantity, Fill Up Time, Total Paid

Service Station -> Station Address,

Car Details -> License Plate, Odometer reading, Fuel Type

Fuel Type, Fill up Time -> Cost per litre

Cost per Litre, Quantity -> Total Paid

(2.) Initially the relation is as follows:-

R (Trip ID, Staff Name, Car Details, License Plate, Odometer Reading, Service Station, Station Address, Fill up Time, Fuel type, Quantity, Cost per Litre, Total Paid)

For 1 NF there should not be composite attributes,in the above relation Staff Name and Station Address are composite attributes therefore it will be decomposed as follows:-

R (Trip ID, Staff First Name,Staff Last Name, Car Details, License Plate, Odometer Reading, Service Station, Street, City, State, Zip Code, Fill up Time, Fuel type, Quantity, Cost per Litre, Total Paid)

For 2 NF there should not be partial dependency that is non prime attribute should not dependent upon any 1 prime attribute of candidate key, since in the given relation there is only 1 candidate key which is only Trip ID, therefore the relation is already in 2 NF.

For 3 NF there should not be transitive dependency that is non prime attribute should not dependent upon the other non prime attribute, if it is present then the relation will be decomposed into sub relations, the given relation is not in 3 NF therefore it will be decomposed as follows:-

R1 (Trip ID, Staff First Name, Staff Last Name, Car Details, Service Station, Quantity, Fill up time, Total paid)

R2 (Service Station, Street, City, State, Zip Code)

R3 (Car Details, License Plate, Odometer reading, Fuel Type)

R4 (Fuel Type, Fill up Time, Cost per litre)

R5 (Cost per Litre, Quantity, Total Paid)

(3.) After the 3 NF we add the primary and foreign key constraints as follows:-

R1 (Trip ID, Staff First Name, Staff Last Name, Car Details, Service Station, Quantity, Fill up time, Total paid)

R2 (Service Station, Street, City, State, Zip Code)

R3 (Car Details, License Plate, Odometer reading, Fuel Type)

R4 (Fuel Type, Fill up Time, Cost per litre)

R5 (Cost per Litre, Quantity, Total Paid)

In the above relational schema the primary keys are represented with bold and foreign keys by italic

(4.) The ER diagram of the above relational schema using crow's foot notation are as shown in the attached image below:-

5 0

3 years ago