Recent content by Alfreds9

  1. Alfreds9

    Saw characteristics influencing efficiency in sawing steel?

    Hello, I am having a headache to try understand a possibly simple real-world problem: efficiency (as in number of strokes/cumulative length needed) to saw steel, assuming a constant sawing length per stroke and a known steel sectional area. I began to think about the few assumptions I assume...
  2. Alfreds9

    Finding the acoustic point in a valley

    Thank you for your replies. You're right, I forgot to add that most sounds would probably be randomly scattered within 10m from soil level, possibly centered around a fixed point in the valley and they would be prevalently distributed in the lower parts of the valley, within half of Hmax...
  3. Alfreds9

    Finding the acoustic point in a valley

    Hello, I have a practical problem, I'd like to find the "best" spot to hear sounds in a valley (forgive me if "acoustic point" isn't an appropriate term, I just couldn't come up with anything better and scrolling an acoustics text didn't help), or at least a non-blind spot (one which instead...
  4. Alfreds9

    Water wicking up porous media and air humidity ?

    I see, thank you. I erroneously thought it was #3 since I supposed the greater surface area of porous particles could play a role into replacing water vapor content in air more efficiently than porous particles slightly closer to measuring point.
  5. Alfreds9

    Water wicking up porous media and air humidity ?

    Hello, I'd like to know which of these 3 example I sketched would have a steadier and higher air humidity at measuring point, assuming same conditions (except those illustrated as different, like porous media thickness and measuring point), water level and air turbulence within larger container...
  6. Alfreds9

    Maximum light intensity underwater during seasons?

    I see, didn't think about this, thank you very much...I always thought that zenith was zenith and it didn't vary noticeably, with temperature variations being mostly dependant on light hours and longer peak time. Where can I find peak average solar irradiation by month (meaning the average...
  7. Alfreds9

    Maximum light intensity underwater during seasons?

    Hi, I was thinking if maximum light intensity underwater during seasons changes somehow. I firstly thought about considering monthly solar irradiance (http://neo.sci.gsfc.nasa.gov/view.php?datasetId=CERES_INSOL_M) however I thought this would have been biased at certain latitudes due to...
  8. Alfreds9

    Pressure inside a plastic bottle filled with water and squeezed by X weight?

    I can't get my head around this (or maybe I just explained my question poorly): if one considers only the weight-bearing area as you suggest, wouldn't a smaller supporting area yield a higher pressure even if weight stays the same, something which doesn't make sense to me since I guess that...
  9. Alfreds9

    Where could I look for down-to-earth X-ray facts?

    I see, now it makes sense, thank you very much!
  10. Alfreds9

    Pressure inside a plastic bottle filled with water and squeezed by X weight?

    I (perhaps wrongly) assumed that pressure inside a bottle with a weight sitting on top should be higher than pressure inside a bottle with no weight on? Here's a sketch I did
  11. Alfreds9

    Is a motionless liquid-floating object possible?

    I've uploaded it again, hopefully this works now
  12. Alfreds9

    Pressure inside a plastic bottle filled with water and squeezed by X weight?

    I have this same question. Could the internal pressure be approximated to Force/Surface, so (mass*g)/surface area of a bottle? How inaccurate would this be? Thank you
  13. Alfreds9

    Where could I look for down-to-earth X-ray facts?

    I see thank you. I've read that while following the same rules of visible light, they reflect a lot less, how true is this? Thank you for the links
  14. Alfreds9

    Is a motionless liquid-floating object possible?

    You're right, of course here it is. [Questionable link deleted by moderator. See the image in post 9 instead] Basically just a small-ish floating stand. Thank you
  15. Alfreds9

    Where could I look for down-to-earth X-ray facts?

    Hello, I'd like to know which book or papers I'd read to understand, possibly without too rigorous mathematics knowledge, how do photons like X-rays or gamma ones reflect off surfaces and attenuate through solids or generally speaking, facts about how do they interact with the real world. So...
Top