Recent content by The_Engineer

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    Bernoulli equation application

    The water level in the object is above the water level in the current because the current is supplying enough pressure to push the water that high. The current has a velocity, and you can probably imagine that faster velocity entails a higher water level in the object. There is also a distance...
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    Convert kcal/(mol-Angstrom) to eV/Angstrom: Advice Needed

    I need to convert kcal/(mol-Angstrom) to eV/Angstrom. I have force values in eV/Angstrom, which I can easily convert to Newtons. I just can't find any conversion factor anywhere on the web for kcal/(mol-Angstrom) to Newtons or eV/Angstrom! Any advice?
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    Very Motivational Physics Paper

    I think I saw this paper that someone posted on PF a while ago that outlined how to get good at physics. I've been looking for it for a while but I can't find it... It covered how to study, how often to study, how to be a lifelong learner, and basically just how to be a good physicist... I...
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    Understanding Angular Velocity Qualitatively.

    This is what I was trying to ask in my original post. The "balcony" is actually translating and therefore has no angular velocity, correct? This is because every point on the rigid body of the "balcony" has equal velocities. In order to have angular velocity, the "balcony" would have to have...
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    Understanding Angular Velocity Qualitatively.

    There seems to be different types of angular velocity to me... 1) A rigid body could be moving in a nonlinear path (ex. a pendulum) 2) A rigid body could be rotating about an axis on itself (ex. the Earth rotating about an axis) 3) Both #1 and #2 combined (ex. the Earth moving around the sun...
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    How Do You Calculate Lateral Strain from Diameter Changes?

    I'm trying to compute lateral strain for a bar (strain that would make it thicker, or have more cross sectional area). All I know are the initial and final diameters. This gives me d1 and Δd. Would the lateral strain be Δd/d or ΔA/A? (A is area)
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    Why Does Zero Integration of a Velocity-Time Graph Not Confirm Return to Origin?

    Yes, assuming that the motion is in one dimension, does an integral of zero of a v-t curve indicate that the particle has traveled back to the origin or hasn't moved at all?
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    Why Does Zero Integration of a Velocity-Time Graph Not Confirm Return to Origin?

    Say you have a v-t diagram for the motion of a particle in one dimension where the velocity is positive at first and then negative later. If you integrate and get zero, why doesn't that mean that the particle started moving and then came back to the origin?
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    How to Determine if a Particle Has Returned to the Origin?

    Homework Statement A point begins at rest at x = 0 and accelerates at 1.09 m/s^2 to the right for 10 s. It then continues at constant velocity of 10.9 m/s for 8 more seconds. In the third phase of its motion, it decelerates at 5 m/s^2 and is observed to be passing again through the origin when...
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    Simple vector arithmetic question

    Nevermind I figured it out... I made a mistake by normalizing the resultant, which in turn messed up my final answer.
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    Whats left in physics to discover

    Theoretical physics is basically just a mathematical framework that models what we observe in the natural world. It's just a model, and like every other model it can be improved upon. Classical mechanics is pretty figured out but there is still research in the field today (mostly in mechanical...
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    Simple vector arithmetic question

    Yes I have been using MATLAB to sketch and generate random examples. Here is one... a = <0.3814, 0.9023, 0.2010> c = <0.3965, 0.7378, -0.5463> The angle between these vectors is 45 degrees. I want a vector b such that b is orthogonal to a AND 45 degrees from c. Graphically speaking...
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    Simple vector arithmetic question

    I have two vectors: a = <ax, ay, az> and c = <cx, cy, cz> which have an angle of 45 degrees between them. If I get another vector by b = c - a then shouldn't b be orthogonal to a? I'm assuming this since a + b = c
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    What is an eigenvalue problem?

    Are eigenvalue problems and boundary value problems (ODEs) the same thing? What are the differences, if any? It seems to me that every boundary value problem is an eigenvalue problem... Is this not the case?
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    Maximizing Water Absorption in Plants: Exploring the Diffusion Equation

    That is extremely vague, but you could start with the diffusion equation
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