Recent content by AwfulPhysicist

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    Partial differentiation question rocket trajectory

    Yeah sorry, sure.
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    Partial differentiation question rocket trajectory

    The question wanted it in terms of the constants, the topic I'm doing involves partial differentiation it seems weird that there is no partial differentiation
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    Partial differentiation question rocket trajectory

    I've differentiated it using the chain rule, looks horrible But now I need to get rid of the t's
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    Partial differentiation question rocket trajectory

    hi How can I differentiate this?! Is it just (Terms)^1/2 and differentiate using chain rule? Also how would I be able to get rid of the t's at the end?
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    Partial differentiation question rocket trajectory

    Homework Statement The problem and my attempt are attached Homework Equations Chain rule for partial differentiation perhaps And basic algebra The Attempt at a Solution I'm unsure of how to approach this but I differentiated all the expression at the top.
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    Fluid dynamics: Reynolds Number, Drag Constant

    Thanks Chet, I also realized that Reynolds number will not be the same due to a variation in the drag constant. So we cannot use the same Reynolds number as the first part
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    Fluid dynamics: Reynolds Number, Drag Constant

    I completed 4a successfully, and with 4b, i have 2 queries: a)why can't I let Reynolds # equal to 2.19 x 10^5 (from part a) then simply sub v=4 instead of 5m/s and rearrange for viscosity? I tried it this way first and got a very wrong answer. Why do we, essentially, need to work backwards to...
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    Fluid dynamics: head losses and pressure

    see I worked through 3a) and I was comparing answers, I saw that they omitted v2 (5m/s) their explanation was because it was "defined in the question" I'm not sure what that means 3)b I tried understanding what's going on but I am clueless unfortunately, how exactly did they get 12.1m ? Where is...
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    Fluid mechanics and pipe flow questions

    That's brilliant thank you for explaining so simply
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    Fluid mechanics and pipe flow questions

    Right ok, thank you for your help! Is there a way you could explain q4 about flow direction?
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    Fluid mechanics and pipe flow questions

    yeah but the answer applied the Bernoulli equation when it equated hf=p1-p2/rho g So it can be applied in this situation ..
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    Fluid mechanics and pipe flow questions

    Thank you for all the answers,For q4 -mfb states that there can only be one direction for constant pressure, could you please elaborate? For q5 - velocity must be constant because Qin=Qout BUT if you look at the pressure in p1 and p2 you shall see that pressure is different.. Now using...
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    Fluid mechanics and pipe flow questions

    < Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown >[/color] Pics are attached, my concerns are with question 4 and 5. For q4 -which way is flow? How do we know? -the working then goes on to say that energy loss is compensated by increasing...