Answer:
Combination of one or more columns used to identify particular rows in a relation is a key
English:
Recycling, in general, is good, it saves space in landfills and prevents pollution. Because some of the materials used to make the electronic piece are made with toxic ingredients its better to recycle them instead of having them end up in our oceans. Also, some pieces of electronics contain valuable metals like gold and copper. These Metals can be reused to make new better electronics with having to use the energy and money to produce new materials
Español:
El reciclaje, en general, es bueno, ahorra espacio en los vertederos y evita la contaminación. Debido a que algunos de los materiales utilizados para fabricar la pieza electrónica están hechos con ingredientes tóxicos, es mejor reciclarlos en lugar de que terminen en nuestros océanos. Además, algunos componentes electrónicos contienen metales valiosos como el oro y el cobre. Estos metales se pueden reutilizar para fabricar nuevos y mejores productos electrónicos con la necesidad de utilizar la energía y el dinero para producir nuevos materiales.
Explanation:
In an educational setting, standards-based assessment is assessment that relies on the evaluation of student understanding with respect to agreed-upon standards, also known as "outcomes". The standards set the criteria for the successful demonstration of the understanding of a concept or skill -WIKIPEDIA
Answer:
import java.util.Scanner;
public class Speed{
int speed;
public Speed(int speed){
this.speed = speed;
}
public void checkSpeed(){
if(speed >= 24 || speed <= 56){
System.out.println("Speed is normal");
}
else
System.out.println("Speed is abnormal");
}
public static void main(String...args){
Scanner input = new Scanner(System.in);
int userSpeed = 0;
System.out.println("Enter a speed: ");
userSpeed = input.nextInt();
Speed obj1 = new Speed(userSpeed)
obj1.checkSpeed();
}
Explanation:
