In many ads about germicides, it is claimed that so and so soap kills 99.9% bacteria. This means that if there were 100000 of these microscopic beings, after treatment 99900 will be killed but still 100 will stay alive. One thing they don’t tell is that bacteria growth is exponential and within no time they will multiply again. As the number of surviving bacteria will be less and amount of food is same as before, their proliferation rate is very high and they will grow within no time to large numbers. Only limiting factor against their growth is the starvation… Read More »Ad Makers thrive on ignorance of Public
“Vijay Dinanath Chauhan. Poora naam. Baap ka naam, Dinanath Chauhan. Maa ka naam, Suhasini Chauhan. Gaon, Mandwa …. “, these iconic lines spoken by iconic Amitabh Bachchan in movie Agneepath made people curious to know where is this Mandwa after all. The movie has been made again by Karan Johar having Sanjay Dutt as playing the villain Kancha Cheena who is supposed to be having his nefarious activities in Mandwa, although shooting has not been done in Mandwa at all. Mandwa is a coastal village and a ferry landing about 15 km from Alibaug and by road 117 km from… Read More »Where is Mandwa?
It is generally said that change is for the better. It is a general statement and hence may not be always true or valid for all changes. Sometimes change can disturb your balance with the nature and people and can result in problems and makes you repent your decisions. For example, the weather at the new place may not suit you and you shall not feel in good spirits. Your moral can come down. Sometimes, the people at new place may not turn out to be of your liking and you will feel cut off and isolated. Then you may… Read More »Change is not always for the better
We again visited Mumbai, the city where we lived for more than 20 years during my posting there in ONGC. We lived in Panvel, a town falling on the Mumbai-Pune highway about 50 kilometers from Mumbai. We left the place on my transfer to Dehradun. Our children grew and got educated while we were there. As everyone knows no city in India is like Mumbai. It is always active, seldom goes to sleep, people seem to be in a great hurry and belong to every strata from billionaires to beggars. There is never any fear in the night like North… Read More »In Mumbai
Here are some pictures taken from the train during recent journey from Delhi to Dehradun. It is April beginning. There are golden wheat fields, sugarcane and poplars. There are water bodies near Haridwar in which you can see the reflection of poplar trees.
Ammonia is a chemical of great industrial importance as it is used in making the nitrogen based fertilizers. Its demand is so high that when Haber who developed the synthesis of ammonia by combining nitrogen and hydrogen using catalytic method, he was awarded Nobel prize. Here we will discuss its peculiar structure. Nitrogen is the central atom to which 3 hydrogen atoms are attached. But due to sp2 hybridized bonds it is not flat but trigonal prism. A pair of electrons resides on the nitrogen giving it basicity. The ammonia molecule readily undergoes nitrogen inversion at room temperature like an… Read More »Ammonia Clock
There are atoms which have same chemical properties but different atomic weights. They have same atomic mass because number of protons are identical but additional neutrons make then different in weight. Such atoms are called isotopes. For example carbon which has 6 protons and 6 neutrons have an isotope which have 6 protons but 8 neutrons. They are presented as C14 and C12. Addition of protons make them less stable and many of them are radioactive. The rate at which a particular atom decays is independent of temperature, light or darkness. During decay the atom is trying to achieve state… Read More »Carbon Dating
It is the beginning of the month of April and Delhi has already become hot. The weather in India changes every 3 months. It is the spring season and soon sweltering heat will envelope North India. Dehradun which is situated in a valley between Lower Himalaya and Shivalik hills named after Lord Shiva. We boarded the train from New Delhi Railway station at 06 hrs and 50 minutes and it is all sitting on chair cars. Due to being an AC train, it is closed with glass panes. Soon we were hurtling through the vast plains of North India. The… Read More »Train Journey from Delhi to Dehradun
Human beings are endowed with a fantastic and most developed brain. While animals settle their scores for supremacy by physical fighting, the humans do this by mind games. It is due to this reason, we are constantly trying to know what is going on in the minds of others. Brain is the most complex organ and marvel of God. We have understood a mere tip of the iceberg. It works on conscious and sub-conscious levels. Our thoughts which shape our personality originate, processed and stored in our brains. We also want to be better persons adored by large number of… Read More »Johari window: A tool to gauge human relations