A plane mirror is a mirror with a flat reflective surface. The image formed by a plane mirror is always upright and has the same shape and size as the object. They are used in periscopes, car wing mirrors, SLR camera, etc. 

Twin Prime Numbers:Two prime numbers whose difference is two are called twin-primes.Two consecutive odd prime numbers are called twin-primes.For example,5, 7 are twin primes as they are prime numbers and their difference is two.Similarly, {3,5}, {5,7}, {11,13,} and {17,19} are twin primes

Simple Interest Simple interest is interest calculated only on the principal portion of a loan. If P = principal, T = time in years;  R = rate of interestThen simple interest SI = $\frac{PTR}{100}$ Amount = P + SI = P + $\frac{PTR}{100}$ = P [$1 + \frac{TR}{100}$] Simple interest ... Read More

Hello Shambhavi, The seven steps of digestion are as follows: 1. Ingestion: It is the entry of food into the mouth. Chewing breaks the food into small pieces and saliva mixes with food that can be easily passed through to the stomach through the oesophagus. 2. Propulsion: It is the ... Read More

Simple interest is a way that interest can be calculated on a loan or investment. The standard formula is $S.I = P\times R\times T$ “P” is the principal on the loan,  “R” is the rate at which interest is being charged, and “T” is the time over which ... Read More

ATP (Adenosine triphosphate) is a nucleotide that performs many essential functions in the cell.Carbon, nitrogen, hydrogen, oxygen, and phosphorus are the building blocks of ATP.It captures chemical energy which is obtained by the breakdown of food molecules and releases it to fuel other cellular processes.Some important functions of ATP in ... Read More

Nitrogen Cycle- It is the circulation of nitrogen in where it is converted into various chemical forms as it circulates among the atmosphere, terrestrial, and marine ecosystems.It is a continuous or an endless cycle where nitrogen moves from the atmosphere to earth, through soils and back to the atmosphere. ... Read More

Periodic tableThe periodic table, also known as the periodic table of elements, is a tabular form of display of the chemical elements that are arranged by their order of atomic number, electron configuration, and recurring chemical properties. 

The word 'psychology' derives from the Greek word, meaning the study of the psyche, or soul (psyche, "breath, spirit, soul" and logia, "study of" or "research").Psychology is the scientific study of mind and behaviour, that includes the study of conscious and unconscious phenomena, as well as feeling and thought.Read More

Fixed joints or Immovable joints: These are those types of joints where no movement of bones is possible. These joints are connected by fibrous tissue, consisting mainly of collagen.Examples of fixed or immovable joints are as follow:1. The joint between the tooth and the jaw.2. The Joints between the vertebrae.3. The ... Read More