Sai Science academy

 Q1) What is a Black hole Ans- A Black is a region of space time where gravity is intense  Q2) How is a Black hole formed  Ans- a Black hole is formed when a massive star explodes, this process is called supernova, in this way a Black hole is formed. Did you know! Our can't form a Black hole because it is not too massive, thus when Sun explodes it is not called as supernova Q3) Where are the black holes present? Ans- The supermassive Black hole lie at the center of the Galaxies. Did you know! The name of the black hole present at center of MILKY WAY GALAXY is SAGITTARIUS A  Q4) Why black holes so intense Gravity  Ans- The gravity is so strong because matter has been squeezed into a tiny space. Did you know! The gravity in black holes are so strong that even light can escape. 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 ...

 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  ...

Conductors : Some substances readily allow passage of electricity through them, others do not. Those which allow electricity to pass through them easily are called conductors. They have electric charges (electrons) that are comparatively free to move inside the material. Metals, human and animal bodies and earth are conductors. Insulators: The substances through which electric charges cannot flow easily are called insulators. Most of the non-metals like glass, porcelain, plastic, nylon, wood offer high resistance to the passage of electricity through them. They are called insulators. 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.

 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...

 Q1) Light   a ray or a wave or a particle Ans- In first of classes light is taught to us as a ray and it travels in a straight line  But then after in further classes its told light is a wave   Then again in higher classes it is told light is a particle Now we will get confused that is light a ray or a wave or a particle  Light is a particle called photon,  It is also a electromagnetic wave, a transverse wave Q2) How light travels in higest speed? Ans- Light is made of a particle called photon. Photon  is a massless particle, that means it has no mass, now we know that if a particle has no mass then there will be no resistance force (i.e. Friction, gravity) nothing will stop this Photon, so that's the reason light travels very fast. 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...

 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...

 The larynx, commonly called the voice box or glottis, is the passageway for air between the pharynx above and the trachea below. ... The larynx plays an essential role in human speech. During sound production, the vocal cords close together and vibrate as air expelled from the lungs passes between them.

 Space science encompasses all of the scientific disciplines that involve space exploration and study natural phenomena and physical bodies occurring in outer space, such as space medicine and astrobiology.