Probably you don't know

Which one win the race- solid and hollow cylinder Consider two cylinders of different metals, different diameters, and different in mass now take example   One is a copper metal and another one is aluminium  Now Consider  copper as mass M1 and aluminium as M2 and and also consider that mass of the copper is greater than the mass of the aluminium  And here diameters also varies now place them on a sliding plane and remove the barrier both cylinders will Start rolling in a pure rolling manner now which one wins the race  You might think the copper with heavier mass wins the race  but actually not, neither one wins  both will reach the point at same time now again repeat the task with material of different diameter and length  The results is neither one wins the race Finally take an one  hollow material and another one solid material now did the  same race here the result change hollow one lose the game The reason is kinetic energy (1/2 mv2) and  Geom

Health fact- coconut Nowadays we  slowly forgetting the importance of coconut. The coconut products like white coconut chutney, coconut burfi, coconut candy (coconut- jaggery balls) Coconut has high medicinal value. A substance called Monolaurin Which is derived from lauric acid in coconut milk.  Monolaurin is antibacterial and antiviral agent  Monolaurin will increase our metabolism and also good for heart with some   amount  Monolaurin is presents major amount in coconut and human breast milk and limited amount in animal milk Coconut from its tree to root all the products are useful to human

What happen when we charge our Mobile phone over night what happen When we charge our phone over night before that we move  to the charger working, when the mobile phone is connected the A.C current of 240V step down to about 5V and later it converts into D.C current by rectifier and filtered and connect to the charging port Intially the phone get completed charged and the automatic turn off system cut-off the charging but after few minutes Mobile charge drain from 100% to 99% but it is still connected so the circuit will again closed and get charge the mobile phone to 100% and it will loop  It may affect your phone charger  and battery

Why spacex takes 19 hours for reaching ISS The crew demo launch (Launch America) mission is successful launched at 30-May-2002 with two astronauts into ISS (International space station) It takes 19 hours to reach ISS   Why it is a long journey ? ISS is located at altitude of 400km but crew dragon rocket can easily reach within 10 mins  But in this mission they going with an two astronauts so the acceleration must be low and it revolves the earth slowly and get in to its orbit Maximum an astronaut will feel safe Upto 3times the gravity (3g-3*9.81 ≈30m/s2) Mission has Two technological updates   one is touchscreen display technology And second one is the astronaut suit this suit more  comfortable than before it  was designed by famous Hollywood costume designer how worked in  Captain America- civil war, Batman Vs Superman , Wonder women

Things we should learn from Macaque Monkeys The macaques constitute a genus of gregarious Old World monkeys of the subfamily Cercopithecinae. This macaque monkey are social animal lives in group, In 1960 a ghastly series of  experiment conducted on this monkey In this 15 monkeys in a Group Monkeys were fed only if they were Willing to pull other one on a chain of electric shock wire  If they didn't do it they will starve they refused it In this 2/3 rd of monkeys left hunger  Again the experiment was conducted on remaining 1/3 rd of monkeys they also refused it  If this isn't heroism then what is; This is Relative social status Like that we should not push down others for our development

How fast the satellite revolves the earth The satellites revolves the earth every 90 minutes average about 16 times a day  which are at an LEO (Low Earth Orbit) altitude of 400km from above sea level it is moving at a speed of 8 km/s to stay in orbit and against gravity .Gravity at this altitude is around 90% of Earth gravity An object revolving the earth  fall 5 meter in every 8km of rotation so for that satellites, ISS  are maintained at 8km/s speed.

Health benefits of Tryptophan Amino acid Tryptophan Amino acid is  majorly found in meat, fish and rich protein content foods this  amino acid has health benefits like   1.Promoting healthier and better quality sleep 2.Relief from depression and anxiety 3.Increased emotional well-being 4.Managing pain tolerance The body uses tryptophan to help make niacin, melatonin, and serotonin. Serotonin is thought to produce healthy sleep and a stable mood.

Why Auto-rickshaw tyres are tilted  Many times we saw auto tyres are tilted slightly about 1-3° vertical it is called Camber  Camber is are three types 1.Positive Camber  2. Negative Camber 3.Neutral Camber When the auto-rickshaw is unloaded the tyres will look tilted when it is fully  loaded with passengers the tyre inclination will become straight. It also help to withstand heavy load during traction and avoid tyre wearing during running Negative Camber are used in off-road vehicle like tractor

Bio-Mimetic_Green coconut We use coconut trees and it's parts in many ways Apart from its uses  also inspires engineers about the designs of its coconut bottom. Bottom of the coconut is like a  parabolic curve. The curve like structure prevents the inner shell of the coconut when it falls down This  concept is used in aerated drinks making company this parabolic curve like structure which withstand pressure of  the areated drinks and also prevent the bottom during fall down Because parabolic shapes are spread the load evenly examples like 1.Rocket nose 2.Signal receiving Dish

Who is they in interstellar ? In Interstellar movie the word "THEY" has some hidden details In the beginning of the movie Cooper went to NASA's  secret place and he met scientists First in NASA launch station scene Professor Brand:  something send you cooper; they choose you Cooper: who is "THEY"   (silence) Second at scientists meeting scene Cooper: worm holes are not naturally occurring phenomena Dr.Brand : someone placed it !! Cooper: "THEY" And finally at tesseract scene Tars: "THEY" saved me Cooper : who the hell is "THEY"  and why they want to help us So "THEY" represent as  people from future who are living in the fifth dimension here time is represented as a physical dimension (it is also mentioned in this film) The possiblity is If dr.Brand (Amelia) gets in to Wolf Edmond's planet as per plan-B there will be a colony of humans where they are living in higher dimension they

Why glasses are transparent ? Glass is made up from Si & O ,it is commonly found from sand. Si & O are bonding together to form  a crystal ,when we melt it. Now why glasses are transparent. In Silicon di oxide ,electrons orbit are so far from one to another.So that it will allow photons through it.So light is not reflected and looks transparent. But why other solids are not transparent.If any solid object look like green color that is not a green color ,other colors are passes through it ,green color is reflected that's why we saw green color. The lights pass through that object but some photon rays are hits the electron to change orbit ,this effect  causes color reflection.But how the color are varient ,because it's depend on the structure of the electron orbit & speed of electron.The electron speed decides the reflection rate ,that decide wavelength.Finally wavelength decides color.We saw green color (approx) 560-520 nm wavelength.