Recent content by aldo sebastian

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    Magnetic field on a loop due to another loop

    In the attached picture, the outer wire is carrying a current I(t), and it's asked to find the induced EMF in the inner loop. Now I have indeed calculated the B-field along the z-axis due to the outer loop. My lecturer then puts z=0 into that expression and then multiplied it with the area of...
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    Why is solar radiation equal to long wavelength emission?

    But then now the solar radiation adds energy to the system; shouldn’t the emission increase because now it receives more radiation than before? i.e. the solar radiation adds more energy to the surface than before, and thus should increase its temperature more, and thus its emission?
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    Why is solar radiation equal to long wavelength emission?

    In my heat transfer course, I always had to do analysis of long-wavelength radiation between surfaces first, and find the heat radiated from one of the surface. Then, solar radiation is added to the problem, and suddenly it was said that solar radiation=heat radiated from this surface! Does...
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    Eigenfrequencies of a multiple DOF system

    I am confused with this concept. So if a system possesses multiple possible eigenfrequencies (and therefore modes), how does the system "know" which eigenfrequency will it want to vibrate on? Does that depend on the initial condition you give the system? Is there any mathematical relation...
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    Scleronomic or Rheonomic Mechanical System?

    No, the constraints here are not the pendulums but the rod that connects the pendulum. Now, try to find the equations that describe each constraint (i.e. the constraint equations) in the inertial frame of reference. Put all terms on the LHS (i.e. set RHS equals 0). This is then called the...
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    Fluid Mechanics dimensional analysis repeating parameters

    This is more of a concept question; if I choose different repeating parameters to someone else, say my lecturer, and got different pi groups to him/her, however my groups are still dimensionless (i.e. the units for each pi group cancel to 1), is my answer still correct?
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    Work done on real thermodynamic data

    It's a course lab problem; yea I think I need to go and read a numerical methods book as you said. Thanks for your help
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    Work done on real thermodynamic data

    It seems that I need to do numerical integration to find the work done for the real data (because I'm specifically told to find the work done from the real data not from the ideal cycle). Does anyone know how to do that in excel say? or does it have to be in MATLAB or some other advanced software?
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    Work done on real thermodynamic data

    Yes there are. The power stroke is pv^-1.5=544.7 and the compression process is pv^-1=199.7
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    Work done on real thermodynamic data

    Homework Statement I have the data for a p-v diagram from experiment of a fluid (the fluid is unknown). The data is attached below as the crosses. It also has the approximated ideal cycle for that data. Does anyone know how to find the work done for this real experimental data? Maybe a MATLAB...
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    Throttling Calorimeter water equivalent

    Homework Statement Steam runs through a pipe, and the state of the steam is required to be found. To do this, some of the steam was condensed inside a container filled with water. The container weighs 850g, and has 8kg of liquid water inside it initially. The whole system was measured to be...
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    Mechanics and materials problem....

    The problem is: A copper alloy having gauge length of 2 inches is subjected to strain of 0.4 inch/inch when the stress is 70 ksi. if yield stress is 45 ksi and yield strain is 0.0025 inch/inch, determine the distance between the gauge points when the load is released So I tried to do this...
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