Answer:
Option A is correct
Digital Subscriber line is a way where telephone companies provide internet access for connection.
It is a communication medium used to transfer digital signals. DSL is one of the most popular broadband internet access.
Explanation:
DSL stands for Digital Subscriber Line. DSL works with high-speed bandwidth that connects from a phone jack to a telephone network. DSL works within frequencies. You can use the DSL while making phone calls.
Answer:
Mirrors exist on cars so objects behind or to the side of the vehicle are brought into the driver's view. (such as cars, bicyclists, etc.) These spots are normally referred to as "blind spots", which are locations outside of the driver's peripheral vision that are difficult to see.
Answer:
Let f be a function
a) f(n) = n²
b) f(n) = n/2
c) f(n) = 0
Explanation:
a) f(n) = n²
This function is one-to-one function because the square of two different or distinct natural numbers cannot be equal.
Let a and b are two elements both belong to N i.e. a ∈ N and b ∈ N. Then:
f(a) = f(b) ⇒ a² = b² ⇒ a = b
The function f(n)= n² is not an onto function because not every natural number is a square of a natural number. This means that there is no other natural number that can be squared to result in that natural number. For example 2 is a natural numbers but not a perfect square and also 24 is a natural number but not a perfect square.
b) f(n) = n/2
The above function example is an onto function because every natural number, let’s say n is a natural number that belongs to N, is the image of 2n. For example:
f(2n) = [2n/2] = n
The above function is not one-to-one function because there are certain different natural numbers that have the same value or image. For example:
When the value of n=1, then
n/2 = [1/2] = [0.5] = 1
When the value of n=2 then
n/2 = [2/2] = [1] = 1
c) f(n) = 0
The above function is neither one-to-one nor onto. In order to depict that a function is not one-to-one there should be two elements in N having same image and the above example is not one to one because every integer has the same image. The above function example is also not an onto function because every positive integer is not an image of any natural number.
Answer:
import java.util.Scanner;
public class num8 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("Enter the mass");
double mass = in.nextDouble();
double weight = calWeight(mass);
System.out.println("The weigth is "+weight);
}
static double calWeight(double mass){
double weight = mass*9.80665; // assume a = accelation due to gravity = 9.80665N
if(weight>500){
System.out.println("Too Heavy");
}
else if(weight<100){
System.out.println("Too Light");
}
return weight;
}
}
Explanation:
- Using Java programming language
- The main method is created to request and store a variable, mass in kilogram. The main method call calWeight() and passes the value for mass
- A method calWeight() is created that calculates the weight in newtons (mass * 9.8).
- The method checks if the weight is greater than 500 (prints too heavy) if less than 100(prints to light)
- Returns the weight
