Is Online Tutoring Effective for Last-Minute Test Prep?

  • Thread starter Thread starter Max CR
  • Start date Start date
AI Thread Summary
Online tutoring can be effective for last-minute test prep, but it requires structured guidance rather than informal help through messaging platforms like AIM. Seeking assistance should focus on understanding concepts rather than just getting answers. Engaging with a tutor who can provide targeted explanations and problem-solving strategies is more beneficial. Relying on casual help may not adequately prepare students for their tests. Effective online tutoring emphasizes clarity and comprehension.
Max CR
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Homework Statement



Hi. I hav ea test tomorrow. Can anyobdy help me with these problems? I understand one and two. If anyone could help me over AIM that would be great. My screenname is Cleaver97.

Can anyone help me get started and do these?

THanks!

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Homework Equations





The Attempt at a Solution


 
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If you have a question about a problem explain where you are stuck.

Helping over AIM or email etc isn't the right way to go about it.
 
Thread 'Variable mass system : water sprayed into a moving container'

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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