Sai Science academy

 1. Resource is anything obtained from environment to satisfy our needs and wants.  2. A natural resource is one obtained from nature  3. Exhaustible natural resources are those which are present in limited quantity in nature . Eg:- Forests, coal, petroleum, natural gas etc 4. Inexhaustible natural resources are those which are present in unlimited quantity in nature . Eg:- Air, water, sunlight etc 5. Petroleum is also known as Black gold

 The atomic orbitals of same energy or nearly same energy intermix to give new orbitals of same energy # Half filled orbitals.       Empty orbitals.           Full filled orbitals.  All can do hybridization # The number of hybrid orbitals = Number of intermixing orbitals # The concept of hybridization is for Sigma(single bond) bond and lone pair. # Hybrid orbitals are named after the parent orbital  1s + 1p = sp, sp  1s + 2p = sp2, sp2 

 Q1) What is a pixel? Ans- Pixel is a small dots or squares that make up a image or a screen Many pixels make a screen, every screen has many pixels. Q2) What is HLA typing Ans- HLA typing is a kind of genetic test used to identify certain individual variations in a person's immune system.  This is especially used to find out the type of blood, it is important to know HLA typing, in case of any blood transplant, this is used.  Every people have different HLA typing, so the person with same HLA typing can donate the blood to the person with same HLA typing. So I hope you understand, if you want more information and details on it then tell me in comment's. Q3) What is the purest form of sound? Ans- Beejakshara We hear many different type of sounds, but purest form of sound in beejakshara. Beejakshara is written in hindu texts as OM, shreem, hreem..... Etc. These sounds when you spell then some vibrations starts inside and you start to go into some super meditation.  No...

 There is a Black hole at the centre of the galaxy At center of MILKY WAY GALAXY a Black hole named SAGITTARIUS A  SAGITTARIUS A- Sagittarius A is a bright and very compact astronomical radio source at the Galactic Center of the Milky Way. It is located near the border of the constellations Sagittarius and Scorpius, about 5.6° south of the ecliptic, visually close to the Butterfly Cluster and Shaula. Distance to Earth: 25,640 light years Radius: 22 million km Discovered: 13 February 1974 Coordinates: RA 17h 45m 40s | Dec -29° 0′ 28″ Constellation: Sagittarius Discoverers: Reinhard Genzel, Andrea M. Ghez, Harry Clive Minnett, Robert Brown, Bruce Balick  So for a galaxy there is a Black hole at the center  Hi viewers This is SSA from Learn it, Sai group, I try to spread information through my blogs and websites. Our motto of this group is Information should be free. I will reach u with a lot of topics covered. Visit my blogs and stay tuned  Follow my blog  ...

 Welcome to SSA From learn it  Charge - Charge is the property of matter that produces ans experiences electrical and magnetic effects   Point charge:- when linear size of charged body is much smaller than the distance under consideration, the size may be ignored and the charges body is called point charge.  Electrification - The process of giving charge to a body is called electrification. Methods of electrification  a) Charging by friction Two glass rods rubbed with silk or wool cloth are brought close to each other, they repel each other  The two strands of wool or two pieces of silk cloth, with which rods were rubbed, also repel each other. However, the glass rod and wool attracted each other. Similarly, two plastic rods rubbed with cat's fur repelled each other but attracted the fur. On the other hand, the plastic rod attracts the glass rod and repel the silk or wool with which the glass rod is rubbed. The glass rod repels the fur. In this process whe...

 Welcome to SSA  Q1) Can we hear in space Ans-Sound needs a medium to travel, space is almost vaccum, so sounds can't travel in space, so we can't hear any sound  Did you know!  If sound travels through space then sounds from Sun can reach earth and it can cause worst effects on human hearing, because on Sun a lot of volcanic activities happening every minute, now we can image the sound of volcano eruptions travelling to earth then none of the humans can hear as every time there is unnecessary sound  Q2) How do aeroplanes fly  Ans- Aeroplanes work in a principle called lift it is about pressure difference, now I will tell what's lift When an aeroplane starts to run on runway then the air above the wings blow off , this creates a low pressure region above the wing and a high pressure at bottom, so due this pressure differences aeroplanes lift off, this maintains the balance of aeroplanes Did you know! Aeroplanes change their direction through a pane at the b...

 The amount of energy released when an electron is added to valence shell of a neutral isolated gaseous atom of an element is called Electron Affinity Electron Affinity (EA)  is measured in ev/atom, Kcal/mol, KJ/mol. EA can be calculated indirectly from Born Haber Cycle.  Noble gases have most stable electronic configuration. Hence their EA values are practically zero.  First EA(Electron Affinity)  EA 1 is negative for all elements except Be,  Mg,  N atoms.  Be(+66KJ/mol) Mg(+67KJ/mol) N (+31 K/mol) In groups EA(Electron Affinity) decreases from top to bottom as the atomic size increases EA ( Electron Affinity)  of third period element is greater than second period element of each group  In  VII A group- EA( Electron Affinity)  of Chlorine(Cl) > EA( Electron Affinity) of Fluorine (F)  VI A group EA of Sulphur (S) > EA of oxygen (O)  V A group EA of phosphorus (P)  > EA of Nitrogen (N)  IV A group E...