What helped Taylor through her tough time with being bullied

Find the propagation delay for a signal traversing the in a metropolitan area through 200 km, at the speed of light in cable (2.

Ede4ka [16]

Answer:

t= 8.7*10⁻⁴ sec.

Explanation:

If the signal were able to traverse this distance at an infinite speed, the propagation delay would be zero.

As this is not possible, (the maximum speed of interactions in the universe is equal to the speed of light), there will be a finite propagation delay.

Assuming that the signal propagates at a constant speed, which is equal to 2.3*10⁸ m/s (due to the characteristics of the cable, it is not the same as if it were propagating in vaccum, at 3.0*10⁸ m/s), the time taken to the signal to traverse the 200 km, which is equal to the propagation delay, can be found applying the average velocity definition:

$v = \frac{(xf-xo)}{(t-to)}$

If we choose x₀ = 0 and t₀ =0, and replace v= 2.3*10⁸ m/s, and xf=2*10⁵ m, we can solve for t:

$t =\frac{xf}{v} =\frac{2e5 m}{2.3e8 m/s} =8.7e-4 sec.$

⇒ t = 8.7*10⁻⁴ sec.

4 0

3 years ago

If you flash UEFI and now your computer is no longer working, is there anything you can do to correct the situation?

Annette [7]

<u>Solution and Explanation:</u>

Unified Extensible Firmware Interface (UEFI) is a software program which connects the computer's firmware to its operating system (OS). UEFI is installed by the manufacturer and the first program to be executed when the computer is not turning on. UEFI or BIOS can be corrupted because of the upgrade error or any other damage.

Launch an automatic BIOS/UEFI recovery of the system so that the previous working best version of UEFI/BIOS is recovered and made available. On successful recovery of the BIOS/UEFI, the computer starts working.

6 0

2 years ago

A perfect binary tree is a complete binary tree with all levels fully filled. Add a method in the BST class to return true if th

algol [13]

Answer:

class BST {

static class Node

{

int val;

Node left, right;

}

static boolean checkPerfectBT(Node node, int h, int d)

{

if (node == null)

return true;

if (node.left == null && node.right == null)

{

if(h==d+1)

return true;

else

return false;

}

if (node.left == null || node.right== null)

return false;

return checkPerfectBT(node.left, h, d+1) && checkPerfectBT(node.right, h, d+1);

}

static int height(Node node)

{

int dep = 0;

while (node != null)

{

node = node.right;

dep=dep+1;

}

return dep;

}

static boolean isPerfectBT(Node node)

{

int h = height(node);

return checkPerfectBT(node, h, 0);

}

static Node addNode(int x)

{

Node node = new Node();

node.val= x;

node.right = null;

node.left = null;

return node;

}

public static void main(String args[])

{

int i,j,k;

Node node= null;

node = addNode(34);

node.left = addNode(2);

node.right = addNode(322);

node.left.left = addNode(21);

node.left.right = addNode(23);

node.right.left = addNode(37);

node.right.right = addNode(54);

if (isPerfectBT(node) == true)

System.out.println("This is a Perfect Binary tree");

else

System.out.println("This is Not a perfect Binary Tree");

}

Explanation:

Calculate the depth of BST by using a while loop until it reaches a null value.
In the addNode method, make an object of Node class.
In the main method, pass the values to addNode method.
Finally display the relevant message to show if it's Perfect or not.

6 0

3 years ago

You need to design a new Access database. The first step is to organize the smallest to largest data, also called a. Alphabetica

Whitepunk [10]

Answer: d) Hierarchy of data

Explanation:

Hierarchy of data is defined as arrangement of data in systematic way .The arrangement of files,character,records etc is done in a particular order usually in terms of highest level and lowest level .
According to the question ,hierarchy of data should be used for organizing data from smallest stage to highest stage for database designing.
Other options are incorrect alphabetical designing is based on alphabetical order. Detail structure is a model made on basis of details and features.
Data design is the model or structure that includes data and related factors as building block.Logical order is the organizing elements on basis of particular logic.
Thus, the correct option is option(d).

3 0

2 years ago

Consider the following definition of a recursive method. public static int mystery(int[] list, int first, int last) { if (first

ozzi

Answer:

c. 27

Explanation:

In recursion method, a method calls itself until a condition becomes true and returned back. In mystery(), at first time, first is 0 and last is 4. Condition is checked and 0!=4 so else part is executed in which again mystery is called with first as 1 and last 4. This will go again and again until first=4.
When first=4 it is also equal to last so if part is executed and alpha[4] is returned which is 9, now it comes alpha[3] +9 which is 8+9 =17 .
It is returning values to its previous calls that is why it will reduce to alpha[0]+alpha[1]+alpha[2]+17 which is nothing but sum of all elements of a alpha
Then, 1+4+5+8+9=27.

5 0

3 years ago