It is an elementary and exciting chapter in class 9. You can note this lesson as your revision notes as well. You see several things in this universe, what do you think this universe is made up of? It...
Suppose an object having mass m has an initial velocity u and after certain time t it attains a velocity v. Now momentum P1=mu and P2=mv So change in momentum =P2-P1=mv-mu =m(v-u) So the rate of change...
(क) इ या ई के आगे कोई विजातीय (असमान) स्वर होने पर इ या ई को ‘य्’ हो जाता है। (ख) उ या ऊ के आगे किसी विजातीय(असमान) स्वर के आने पर उ या ऊ को ‘व्’ हो जाता है। (ग) ‘ऋ’...