Etoos India Lecture

🍒BORON: •In casting of copper as a dioxidizer •Boron rods used in automic reactor. •Boron fiber used in bullet proof jacket, •In composite material of aircraft •Used in braintumer therapy. 🍒 BORAX: •As a flux for soldring metal. •In borex bead test •In softning of water •Antiseptic •Manufacturing of enamels of glazes, tiles. •For making optical and borosilicals SS. •Food preservative 🍒 ALUMINIUM: • Making house hold, untensils, frames, roof,aircrafts. • Electric wire. •Thermite process (In metallurgy of Cr, Mn, Fe) •For transportin nitric acid. •AI, Hg used as reducing agent. •Aluminium powder + Ammonium nitrate. 🍒 LEAD [Pb]: •In making telegraph and telephone wires •Making bullets •Making chamber in HSO, process. 🍒 NITROGEN: •In the manufacturing of HNO3, NH3, CaCN2. •Liquid nitrogen used as refrigrant. •Inert atmosphere in metallurgy. •Gas thermometer and electrical bulb 🍒 NH3: • Refrigeration •Manufacturing HNO3, NaHCO3 •Artificial Silk. • Urea Formation •For solvent 🍒 HNO3: • Manufacturing of ammonium nitrateas fertilizer. •In explosive • For making nitroglycerine. • Making TNT. • Pickling against of stainless steel. • Etching of Metal •Oxidizer in rocket fule.

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❣ETOOS LECTURES❣ 🦋 Click on the subject to get the video 🦋 👉 PHYSICS (NV SIR) 👉 MATH ( GB SIR ) 👉 CHEMISTRY 🉐️ Physical CHEMISTRY ~PS SIR PHYSICAL JEE 🉐️ INORGANIC CHEMISTRY ~PS SIR INORGANIC JEE 🉐️ ORGANIC CHEMISTRY ~NJ SIR ORGANIC JEE 👉FOR MORE LECTURES JOIN 👉FOR DPP'S JOIN 👉FOR DAILY QUIZES JOIN NO LINK SHOTNER OR ANY THING JUST CLICK ON SUBJECT AND GET LECTURE IN STREAMABLE FORM

💎Notes on Gravitation and Projectile Gravitation:- Kepler’s first law (law of elliptical orbit):- A planet moves round the sun in an elliptical orbit with sun situated at one of its foci. Kepler’s second law (law of areal velocities):- A planet moves round the sun in such a way that its areal velocity is constant. Kepler’s third law (law of time period):- A planet moves round the sun in such a way that the square of its period is proportional to the cube of semi major axis of its elliptical orbit.Keplers Law of Planetary Motion T2 ∝ R3 Here R is the radius of orbit. T2 = (4π2/GM)R 3 Newton’s law of gravitation:- Every particle of matter in this universe attracts every other particle with a forcer which varies directly as the product of masses of two particles and inversely as the square of the distance between them. F= GMm/r2 Here, G is universal gravitational constant. G = 6.67 ´10 -11 Nm2 / kg2 Dimensional formula of G: G = Fr2/Mm =[MLT-2][L2]/[M2] = [M-1L3T-2] Acceleration due to gravity (g):- g = GM/R2 Variation of g with altitude:- g' = g(1- 2h/R), if h<<R. Here R is the radius of earth and h is the height of the body above the surface of earth. Variation of g with depth:- g' = g(1- d/R). Here g' be the value of acceleration due to gravity at the depth d. Variation with latitude:- At poles:- θ = 90°, g' = g At equator:- θ = 0°, g' = g (1-ω2R/g) Here ω is the angular velocity. As g = GMe/Re2 , therefore gpole > gequator Gravitational Mass:- m = FR2/GM Gravitational field intensity:- E = F/m = GM/r2 Weight:- W= mg Gravitational intensity on the surface of earth (Es):- Es = 4/3 (πRρG) Here R is the radius of earth, ρ is the density of earth and G is the gravitational constant. Gravitational potential energy (U):- U = -GMm/r (a) Two particles: U = -Gm1m2/r (b) hree particles: U = -Gm1m2/r12 – Gm1m3/r13 – Gm2m3/r23 Gravitational potential (V):- V(r) = -GM/r At surface of earth, Vs= -GM/R Here R is the radius of earth. Escape velocity (ve):- It is defined as the least velocity with which a body must be projected vertically upward in order that it may just escape the gravitational pull of earth. ve = √2GM/R or, ve = √2gR = √gD Here R is the radius of earth and D is the diameter of the earth. Escape velocity (ve) in terms of earth’s density:- ve = R√8πGρ/3 Orbital velocity (v0):- v0 = √GM/r If a satellite of mass m revolves in a circular orbit around the earth of radius R and h be the height of the satellite above the surface of the earth, then, r = R+h So, v0 = √MG/R+h = R√g/R+h In the case of satellite, orbiting very close to the surface of earth, then orbital velocity will be, v0 = √gR Relation between escape velocity ve and orbital velocity v0 :- v0= ve/√2 (if h<<R) Time period of Satellite:- Time period of a satellite is the time taken by the satellite to complete one revolution around the earth. T = 2π√(R+h)3/GM = (2π/R)√(R+h)3/g If h<<R, T = 2π√R/g Height of satellite:- h = [gR2T2/4π2]1/3 – R Energy of satellite:- Kinetic energy, K = ½ mv02 = ½ (GMm/r) Potential energy, U = - GMm/r Total energy, E = K+U = ½ (GMm/r) + (- GMm/r) = -½ (GMm/r) Gravitational force in terms of potential energy:- F = – (dU/dR) Acceleration on moon:- gm = GMm/Rm2 = 1/6 gearth Here Mm is the mass of moon and Rm is the radius of moon. Projectile:- Projectile fired at angle α with the horizontal:- If a particle having initial speed u is projected at an angle α (angle of projection) with x-axis, then, Time of Ascent, t = (u sinα)/g Total time of Flight, T = (2u sinα)/g Horizontal Range, R = u2sin2α/g Maximum Height, H = u2sin2α/2g Equation of trajectory, y = xtanα-(gx2/2u2cos2α) Instantaneous velocity, V=√(u2+g2t2-2ugt sinα) and β = tan-1(usinα-gt/ucosα) Projectile fired horizontally from a certain height:- Equation of trajectory: x2 = (2u2/g)y Time of descent (timer taken by the projectile to come down to the surface of earth), T = √2h/g Horizontal Range, H = u√2h/g. Here u is the initial velocity of the body in horizontal direction.

Periodic Table Chemistry Tricks - Group 1 - Lina Kare Rab Se Fariyad Elements - Li, Na, K, Rb, Cs, Fr Group 2 - Beta Mange Cars Saari Baap Roye Elements - Be, Mg, Ca, Sr, Ba, Ra Group 13 - Bengan, Aaloo, Gazar In Thella Elements - B, Al, Ga, In, Tl Group 14 - Chemistry Sir Gives Sanki Problems. Elements - C, Si, Ge, Sn, Pb Group 15 - Nepal Pakistan Australia Sab Bikhari (No offence!!) Elements - N, P, As, Sb, Bi Group 16 - Old Style Se Tepo Elements - O, S, Se, Te, Po Group 17 - Fir Call kar Bahaar AayI Aunty Elements - F, Cl, Br, I, At Group 18 - Heena Neena Aur Kareena Xenath Rangeen Elements - He, Ne, Ar, Kr, Xe, Rn D blocks elements - Esi TV Corporation Mange Fir raha hein, Koi Ni Kuch nahi Janta Elements - Sc, T, V, Cr, Mn, Fe, Co, Ni, Cu, Zn 🅂🄷🄰🅁🄴 🅆🄸🅃🄷 🅈🄾🅄🅁 🄵🅁🄸🄴🄽🄳🅂 🤝🤝🤝 For More Join @iit_jee_lectures

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🤩Illustration of Solid and Liquid of same refractive index. 😱Learn with Practical😎