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Dahasolnce [82]
2 years ago
8

An optical fibre has an attenuation of 0.3 dB/km. If a laser launches an optical power level of PIN (mW) into 35 km length of th

is fibre, at what distances will the power have dropped to:
(a) 75%

(b) 50%

(c) 25%

(d) 12.5%

(e) 6.25%

of the input power level? Plot these points on a graph of P IN/P OUT versus distance along the fibre.
Computers and Technology
1 answer:
REY [17]2 years ago
6 0
I think it’s 75% sorry if it’s wrong :(
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When you're working with a word processing document and you press the del key, what happens?
LuckyWell [14K]
The correct answer is C.
6 0
3 years ago
Write a program that takes in an integer in the range 20-98 as input. The output is a countdown starting from the integer, and s
S_A_V [24]

Answer:

// program in C++.

#include <bits/stdc++.h>

using namespace std;

int main() {

//  variable  

int num;

cout<<"Enter the number between 20 and 98: ";

// read number

cin >> num;

while(num<20||num>98)

{

   cout<<"Wrong input!!enter number between 20-98 only:";

   cin>>num;

}

cout<<"The output is: ";

while(num % 10 != num /10)

{

// print numbers.  

cout<<num<<" ";

// update num.

num--;

}

// display the number.

cout<<num<<endl;;

return 0;

}

Explanation:

Read a number from user and assign it to variable "num".Check if entered number  is in between 20-98 or not.If input number is less than 20 or greater than 98 then  ask again to enter a number between 20-98 until user enter a valid input.Then print  the countdown from input number till both the digit of number are same.

Output:

Enter the number between 20 and 98: 99                                                                                    

Wrong input!!enter number between 20-98 only:12                                                                            

Wrong input!!enter number between 20-98 only:93                                                                            

The output is: 93 92 91 90 89 88

Enter the number between 20 and 98: 77                                                                                    

The output is: 77

7 0
3 years ago
Malware is any malicious software installed on a computer or network without the owner’s knowledge.
Naya [18.7K]

Answer: True

Explanation: Malware is literally short for malicious software. The name that is given to any type of software that could harm a computer system or collect a user's data.

Hope it helped please mark as brainliest!

8 0
3 years ago
should variables that contain numbers always be declared as integer or floating-point data types? why or why not? name potential
Stells [14]

No, it is not necessary that variables that contain numbers should always be declared as integer or floating-point data types.

It is not necessary that variables that contain numbers should be declared as integer and floating point data types. Because number can be declared with different data types.  As we know that data type is a vital aspect in programming. It describes the type of a value that is contained in a variable. It is the data type based on which memory is allocated to a number or any type of variables.

Numbers can be whole decimal/fractional, signed, unsigned, small, and long. Simply, they exist in a variety of values. According to their values range, the amount of memory is reserved.

Different programming languages offer different data types to store numbers, depending on their types and size. Let’s consider some examples of data types used in programming languages in order to declare variables holding numbers.

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  • SQL uses INTEGER, SMALLINT , BIGINT , NUMERIC() , and DECIMAL() data types for numbers.
  • To deal with number type variables, Java has six predefined data types, such as int, long, short, byte, float, and double.
  • JavaScript uses a single data type called 'number' to declare numbers.
  • In C++, two fundamental data types, int and float, are used to represent numeric variables. But C++ is not only limited to these two data types. The data type char can also store numbers. Other data types for declaring numbers as variables are derived from int, float and char, such as short int, long int, signed int, unsigned int, double, long double, signed char, unsigned char etc. etc.

So in concluding remarks, declaring a number type variable is not only limited to using integers and floating-points data types. Rather it entirely depends on the respective programming language, and size and type of the number to be stored in the variable.

You can learn more about data types at

brainly.com/question/13438922

#SPJ4

6 0
2 years ago
Bukod sa nakasulat na impormasyon ay makakakita rin ng larawan sa internet.​
faltersainse [42]

i woud love to help but i dont understand the language

7 0
2 years ago
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