Help me revise (basic electronic circuits questions)

IronaSona
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Homework Statement
Hello ,does anyone know where can i find similar questions to this , am trying to practices questions like this for my next assignment which is due . but am not sure what are those questions , is that calculus,algebra or something else , and how can i find more questions like this .

Thank you for any help
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Try doing this Google search -- it looks like you will have plenty of questions to practice on... :smile:

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Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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