modern day theory

(1) " January has 31 days” is a statement. (2) "Null set is a subset of every set” is a statement. (3) "All girls are studious” is not a statement. (4) "Apoorva is honest” is not a statement. Some sentences depend on a variable for its trut..

Multiplication of Matrices - Let us consider the sales done by a school canteen for two successive days. Monday 25 cokes 12 cakes Tuesday 40 cokes 7 cakes Each coke costs $ 5 and cake costs $ 10. The sales can be expressed as a 2 x 2 matrix and the price as a 2 x 1 matrix as given below: ..

In view of new discoveries about atoms, Dalton's atomic theory was modified as given below: * Atom is no longer indivisible as it has a complex structure of sub atomic particles (electrons, protons and neutrons). * Atoms of the same element may posses different relative ma..

Dalton's Atomic Theory Modern Atomic Theory All matter is made up of extremely small particles called atoms An element is made up of extremely small particles called atoms Atoms are indivisible and indestructible Atoms are divisible and are n..

Five basic approaches are followed in the recent days to study human geneti..

According to this theory, all the different forms of life that occur today on planet earth, have been created by God, the almighty. This idea is found in the ancient scriptures of almost every religion. According to Hindu mythology, Lord Brahma, the God of Creation, created the living wor..

It was observed by Fujino (1967) that opening of stomata occurs due to the influx of K + ions into the guard cells. The source of K + ions are the neighbouring subsidiary and epidermal cells, there by increasing the concentration from 50mM to 300mM in guard cells. The increase in K + ion c..

Introduction - In our day to day life, we come across many uncertainty of events. We wake up in the morning and check the weather report. The statement could be 'there is 60% chance of rain today'. This statement infers that the chance of rain is more than that having a dry weat..

What is Physics? - The word 'Physics' comes from the Greek word 'phusis' meaning 'nature', introduced by the ancient scientist 'Aristotle'. Man has always been fascinated by nature. So, he questioned and sought answers for every phenomena nature could offer. The branch of science which is devoted t..

Although Dalton's theory of the existence of atoms was published in 1808, there was no clear idea of what an atom might look like until the early part of the twentieth century. With the advent of electricity and phenomenon of spectrum, experimentation underwent a change and a flurry of r..