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3 years ago

Why we can not see objects around us in the dark

Computers and Technology

1 answer:

malfutka [58]3 years ago

4 0

Answer:

We see an object when light falls on it and gets reflected from its surface and enters our eyes. In a dark room, there is no source of light. no light falls on the surface of objects and we do not see them. This is why we cannot see the objects in a dark room.

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Create a Python program as described below and save it in a file named bool. You should use IDLE or similar environment to creat

Eva8 [605]

PYTHON CODE

# function to compare a and b
def compare(a,b):

    # if a is greater than b , return 1
    if a > b:
        return 1

    # if a and b are equal, return 0
    elif a == b:
        return 0

    # if a less than b , return -1
    elif a < b :
        return -1

# testing
if __name__=="__main__":

    # calling the compare function with a and b
    print('compare(5,2) %d'%compare(5,2))
    print('compare(2,5) %d'%compare(2,5))
    print('compare(3,3) %d'%compare(3,3))

    # getting values for a and b
    a=int(input("Enter the value for a: "))
    b=int(input("Enter the value for b: "))

print('compare(%d,%d) %d'%(a,b,compare(a,b)))

(see attachment for output)

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2 years ago

A website wants to gives out detailed information to viewers about its upcoming conference and also provides a feature for searc

Alenkinab [10]

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3 years ago

Design a program that asks the User to enter a series of 5 numbers. The program should store the numbers in a list then display

klasskru [66]

Answer:

The program in Python is as follows:

numbers = []

total = 0

for i in range(5):

num = float(input(": "))

numbers.append(num)

total+=num

print("Lowest: ",min(numbers))

print("Highest: ",max(numbers))

print("Total: ",total)

print("Average: ",total/5)

Explanation:

The program uses list to answer the question

This initializes an empty list

numbers = []

This initializes total to 0

total = 0

The following loop is repeated 5 times

for i in range(5):

This gets each input

num = float(input(": "))

This appends each input to the list

numbers.append(num)

This adds up each input

total+=num

This prints the lowest using min() function

print("Lowest: ",min(numbers))

This prints the highest using max() function

print("Highest: ",max(numbers))

This prints the total

print("Total: ",total)

This calculates and prints the average

print("Average: ",total/5)

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2 years ago

Write a Java program in jGRASP that creates a 2D integer array of 5 rows and 20 columns, fills it with increasing integer values

Alex73 [517]

Answer:

As per the question we need to make 5 rowa and 2o columns, in this we have total element 100 so range should be 0 to 99, but we are suggested to keep range 0 to 59, so i have kept the elementns in the range, but if it was a typo in the question for range you do not need to reset the k with zero.

Explanation:

//create a new class TestArray

public class TestArray {

//define main method

public static void main(String[] args) {

//declare a 2D array of given size i.e. 5 rows and 20 columns

int arr[][] = new int[5][20];

//declare an integer variable k and initialize it with zero, this will used to initialize the array from 0 to 99

int k = 0;

//for loop for rows

for (int i = 0; i < 5; i++) {

//for loop for columns

for (int j = 0; j < 20; j++) {

//initialize arr with the current value of k

arr[i][j] = k;

//once k is 59 set it zero again as we are not going beyond 59

if(k == 59)

k = 0;

//increment value of k with 1

k++;

}

//print the element from the array one by one

//for loop for rows

for (int i = 0; i < 5; i++) {

//for loop for columns

for (int j = 0; j < 20; j++) {

//print the current element of array and an space with it

System.out.print(arr[i][j]+" ");

}

// move the cursor to new line

System.out.println();

}

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3 years ago

Why we can not see objects around us in the dark​

Why we can not see objects around us in the dark