Questions

Q:

Heat energy is transferred by conduction whenever molecules

A) collide each other B) means of photons
C) particles replaces there places D) All of the above
 
Answer & Explanation Answer: A) collide each other

Explanation:

Heat energy can be transferred by three major methods. They are 

 

1. Conduction,

2. Convection and

3. Radiation.

 

Conduction is the movement of heat through a substance by the collision of molecules

Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy.

Radiation is the transfer of energy by means of photons in electromagnetic waves governed by the same laws. It occurs through a vacuum or any transparent medium.

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Q:

When the Sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible forth is observation is

A) reflection of light B) refraction of light
C) dispersion of light D) scattering of light
 
Answer & Explanation Answer: D) scattering of light

Explanation:

According to Rayleigh's law, the intensity of scattered light varies inversely as the fourth power of its wavelength. Sunlight consists of seven colours. Of these, red has the maximum wavelength. During sunrise and sunset, the rays have to travel a larger part of the atmosphere because they are very close to the horizon.Therefore, light other than red is mostly scattered away. Most of the red light, which is the least scattered, enters our eyes. Hence, the sun and the sky appear red.

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Q:

A genus can best be defined as

A) a taxon composed of one or more species and a classification level lying below family B) a taxon composed of families
C) the most specific taxon D) a taxon comprised of classes
 
Answer & Explanation Answer: A) a taxon composed of one or more species and a classification level lying below family

Explanation:

A genus can best be defined as a taxon composed of one or more species and a classification level lying below family.

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Q:

If you have a keyword with a low CTR, what can you expect?

Answer

A lower Quality Score on the Search Network.

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Q:

Write a c program for quick sort.

Answer

#include<stdio.h>

void quicksort(int [10],int,int);

int main(){
  int x[20],size,i;

  printf("Enter size of the array: ");
  scanf("%d",&size);

  printf("Enter %d elements: ",size);
  for(i=0;i<size;i++)
    scanf("%d",&x[i]);

  quicksort(x,0,size-1);

  printf("Sorted elements: ");
  for(i=0;i<size;i++)
    printf(" %d",x[i]);

  return 0;
}

void quicksort(int x[10],int first,int last){
    int pivot,j,temp,i;

     if(first<last){
         pivot=first;
         i=first;
         j=last;

         while(i<j){
             while(x[i]<=x[pivot]&&i<last)
                 i++;
             while(x[j]>x[pivot])
                 j--;
             if(i<j){
                 temp=x[i];
                  x[i]=x[j];
                  x[j]=temp;
             }
         }

         temp=x[pivot];
         x[pivot]=x[j];
         x[j]=temp;
         quicksort(x,first,j-1);
         quicksort(x,j+1,last);

    }
}

Output:
Enter size of the array: 5
Enter 5 elements: 3 8 0 1 2
Sorted elements: 0 1 2 3 8

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Q:

Ticks and mites are actually

A) Arachnids B) Insects
C) Myriapods D) Crustaceans
 
Answer & Explanation Answer: A) Arachnids

Explanation:
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Q:

Which statement correctly describes the role of chance in evolution?

A) An allele that increases evolutionary fitness cannot be lost from a population by chance events. B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA
C) Evolutionary change proceeds by an accumulation of changes that occur by chance. D) None of the above
 
Answer & Explanation Answer: B) The ultimate source of new alleles is mutation, random changes in the nucleotide sequences of an organism's DNA

Explanation:
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Q:

Which of the following team has won the 37th and final edition of the Hockey Champions Trophy at Breda, the Netherlands?

A) India B) Australia
C) Brazil D) The Netherlands
 
Answer & Explanation Answer: B) Australia

Explanation:

In the summit clash of the 37th and final edition of the Hockey Champions Trophy at Breda, the Netherlands, India lost to defending champions Australia via penalty shoot-off. The match went into the shoot-off after both the teams were locked at 1-1 in regulation time.

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