#include

Write a program to calculate the great circle distance between two points on the surface of a sphere. If p1(x1, y1) and p2(x2,y2

Tamiku [17]

Answer:

import java.lang.*;

public class distance { public static double distance(double latitude1,

double latitude2, double longitude1,

double longitude2)

{

// Convert Latitude and Longitude to Radians

longitude1 = Math.toRadians(longitude1);

longitude2 = Math.toRadians(longitude2);

latitude1 = Math.toRadians(latitude1);

latitude2 = Math.toRadians(latitude2);

double d_longitude = longitude2 - longitude1;

double d_latitude = latitude2 - latitude1;

double a = Math.pow(Math.sin(d_latitude / 2), 2)

+ Math.cos(latitude1) * Math.cos(latitude2)

* Math.pow(Math.sin(d_longitude / 2),2);

double val = 2 * Math.asin(Math.sqrt(a));

// Radius of earth in kilometers is 6371

double earth_radius = 6371;

// Calculate and return the distance

return(val * earth_radius);

}

// Main Method

public static void main(String[] args)

{

double latitude1 = 67.32055555555556;

double latitude2 = 83.31861111111111;

double longitude1 = -1.7217899;

double longitude2 = -1.6567799;

System.out.println(distance(latitude1, latitude2,

longitude1, longitude2) + " K.M");

}

Explanation:

This program is implemented in Java programming language

The formula for the shortest distance between two points on the earth is:

Distance = 3963.0 * arccos[(sin(lat1) * sin(lat2)) + cos(lat1) * cos(lat2) * cos(long2 – long1)]

The latitude and longitude of the two points must be known

The latitude and longitude are converted into radians using built in methods in java.

Take value for the radius of the earth in Kilometers 6371;

Note that a seperate method has been created to calculate the distance

In the driver method (main), values for latitude and logitudes for both places have been hard-corded, then the method distance is called and passed those values

Note also that the distance has been calculated in Kilometers

8 0

3 years ago

your business has a web server that has suddenly become unresponsive. when you study the server's logs there are a huge number

kvasek [131]

there's a chance the web server could quite possibly be backed up from all the requests and not being cleaned or updated often

8 0

3 years ago

Read 2 more answers

(tco 3) what vbscript boolean operator could be used to replace the nested selection structure in this pseudocode? if empmedical

Leto [7]

You want both conditions to be true, so you can "And" them.
In vbscript, the and is written as "And" (not as && like other languages), so you get:

<span>If (empmedicalins = "y") And (empdentalins = "y") Then
print empidnumber, emplastname, empfirstname
Endif</span>

3 0

3 years ago

A(n) _____ is a flexible tool used to analyze data using reports that do not have a predetermined format.

Mandarinka [93]

Answer:

decision support system

Explanation:

4 0

3 years ago

2. A host computer with an IP address of 172.16.29.155 using a subnet mask of 255.255.255.0 and a gateway of 172.16.29.1 pings a

ASHA 777 [7]

Answer:

From the host IP address and subnet mask, you can tell that both computers are on the same network. Host 172.16.29.155 will need to send an ARP request broadcast for 172.16.29.83 to get the MAC address and update its ARP table if the host 172.16.29.83 has not already done so.

Explanation:

<h2>ADDRESS RESOLUTION PROTOCOL (ARP)</h2>

Address Resolution Protocol (ARP) is a procedure for mapping a logical address known as the IP address to a physical address known as MAC (Media Access Control) address in a local area network. The job of the ARP is essentially to translate 32-bit addresses to 48-bit addresses and vice-versa when using IP Version 4 (IPv4) to communicate on the network.

Most of the computer programs/applications use logical address (IP address) to send/receive messages, however, the actual communication happens over the physical address (MAC address) this happens in the layer 2 of the OSI model. An ARP request is a broadcast, and an ARP response is a Unicast.

Scenarios when ARP is used:

Scenario-1: The sender is a host and wants to send a packet to another host on the same network.

· Use ARP to find another host’s physical address

Scenario -2: The sender is a host and wants to send a packet to another host on another network.

· Sender looks at its routing table.

· Find the IP address of the next-hop (router) for this destination.

· Use ARP to find the router’s physical address

Scenario -3: the sender is a router and received a datagram destined for a host on another network.

· Router checks its routing table.

· Find the IP address of the next router.

· Use ARP to find the next router’s physical address.

Scenario -4: The sender is a router that has received a datagram destined for a host in the same network.

· Use ARP to find this host’s physical address.

The situation in the question above falls under scenario-1. From the host IP address and subnet mask, you can tell that both computers are on the same network. Host 172.16.29.155 will need to send an ARP request broadcast for 172.16.29.83 so to get the MAC address and update its ARP table if the host 172.16.29.83 has not already done so.

7 0

4 years ago