What is corrosion? Explain it’s advantages and disadvantages
The natural process that causes the transformation of pure metals to undesirable substances when they react with substances like water... View Article
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Explain on the usefulness and harmful effecys of microorganisms
Microorganisms are minute organisms that are invisible to the naked eye. Microorganisms are so small that they can only be... View Article
What is threshing?
The process of beating out the grains from the harvested crop plants is called threshing. The grains or seeds are... View Article
What is a balanced diet?
A diet that contains all the vital nutrients required by the human body is called a balanced diet. Balanced diet... View Article
Write a note of functions of abscisic acid
Abscisic acid is the growth inhibitor hormone in plants. It is synthesized within the stem, leaves, fruits, and seeds of... View Article
Comment on the following properties: (a) Rigidity (b)Compressibility (c)Fluidity (d)Filling a gas container (e) Shape (f) Kinetic energy and (g)density
All the properties mentioned here are the properties of different states of matter that is solid, liquid and gas. (a)... View Article
Water at room temperature is liquid. Justify
At room temperature (25°C), water is a liquid becauseof the followingproperties of liquid: The volume of water is fixed It... View Article
Explain the rotation of earth
The Earth rotates on its own axis and it rotates in the eastward direction and in a counter-clockwise in prograde... View Article
What is the difference between grain and seed
Seed and grain are the most vital and important part of plants. But these two are different. The differences between... View Article
Explain Euler’s formula
Euler’s formula establishes the fundamental relationship between the trigonometric functions and the complex exponential function. Euler’s formula or Euler’s equation... View Article
What is universal and power set?
A universal set is a set which contains all the elements or objects of other sets, including its own elements.... View Article
A takes 3 hour more than B to walk 30 km. But if A doubles his pace, he is ahead of B by 3 /2 hours. Find their speed of walking
Given:Distance = 30 km Let speed of A be = x km/h & speed of B be = y km/h... View Article
What should be added to 1/4 to get 4/9?
Let the number that should be added to be x. therefore 1/4 + x = 4/9 => x = 4/9... View Article
One-fifth of a numberis 9.Find the number
Let the number be x One fifth = 1/5 According to the given condition 1/5x=9 x/5=9 x=9 X 5 x=45... View Article
Factorise x^2 – 4x-5
X²-4x-5=0x²-5x+x-5=0x(x-5)+1(x-5)(x-5)(x+1)=0x=5 or x=-1
List out the difference between health and disease free
Healthy: It is astate of complete physical, mental, and social well being. It depends upon the individual as well as... View Article
How does a convex mirror always forms a virtual image?
Convex mirrors always form virtual images because the focal point and the centre of curvature of the convex mirror are... View Article
The denominator of a rational number is greater than its numerator by 8. If the numerator is increased by 17 and the denominator is decreased by 1, the number obtained is 3/2. Find the rational number.
Answer: Let the numerator of the rational number be x. So as per the given condition, the denominator will be... View Article
Why in humans embryo gets attached to the uterine wall?
Throughout the various weeks and stages of pregnancy, different parts of the embryo develop and come to be known as... View Article
Why embryo in humans is called foetus?
Foetus refers to the final stage in baby development. An embryo is termed as the fetus in the beginning in... View Article
