Recent content by Bobbywhy

Let us all try to forget this jerk as soon as possible. I am here today typing in some comment on Physics Forums largely because something this jerk tried to do and failed. Long live the non-jerks. Bobbywhy

Our human body is about four-fifths water. Yes, waves may indeed pass through the body. An obese person may be considered mechanically similar to or equivalent to a big oval bag full of water with extremities. If a large but short compressive force is applied to one area we may expect a...

See this video if you thought nothing would go wrong there: Tachoma Narrows Bridge collapse Cheers, Bobbywhy

Here is a fine map of world-wide light pollution. It doesn't tell you where to find all the "space stuff" but it does tell you where are the dark skise nearby you. http://djlorenz.github.io/astronomy/lp2006/ Good stargazing! Bobbywhy

Hi Dave! Re: your graphs 1. Is the first one at ~2320 UTC on 24 August the one recorded off Valparaiso, Chile? 2. Did you receive and record anything on 17 August from Southwestern Iran? 3. Do you know of any theory connecting lunar tidal forces with earthquake activity? Cheers, Bobbywhy p.s...

Don, Well done! Your collection is worthy of a first-class museum rating: Not only does it appear to be in physically in great condition, but evidently much of it functions! Not to mention the superb artistic aspect you've captured. Wish I could see all your collection up close in person...

likephysics, Get used to calibration of laboratory instruments and the reasons why we do it by going to the standards folks at: http://www.nist.gov/calibrations/upload/sp250-46-2.pdf Be sure to check Section 5. Cheers, Bobbywhy

hongiddong, You may visit this website and find clear answers to your questions. http://www.physicsclassroom.com/class/waves/Lesson-3/Interference-of-Waves Cheers, Bobbywhy

Here please find three possibilities you may find a real radio astronomer to deal with your questions: http://www.craf.eu/ Do you have a burning question you'd like to ask an astronomer? Feel free to email it to us (education@icrar.org) and we'll get you an answer. National Radio Astronomy...

neilparker62, Just a comment from me: Whether or not that frequency is common or not, your underlying proposal may have merit. There may be an undiscovered photon emission mechanism. It takes persons like you to form the hypothesis, and then try to disprove it... I congratulate you for...

OOPS! So sorry, I carelessly and mistakenly posted some GHz references. Thanks davenn for watching out for the integrity of our Forum’s posts! There are astrophysical sources of this microwave 16.4 GHz frequency. Many new and planned radio telescopes are being built now will monitor it. Two...

Saladsamurai, During a career of underwater sound (airborne dipped and towed sonar) device manufacture, test, and operation we sometimes had to deal with this, which may (hope it is useful) contain the vortex shedding force because our drag loading in many cases remained steady...

Yes, 16.4 GHz is indeed commonly encountered in radio astronomy. Let us know here at Physics Forums if you get satisfaction. Post your questions here and you may expect highly qualified and experienced members to help guide you along your search. Here are two papers that seem to be about your...

In my estimation we cannot expect to induce cavitation by the application of the sound energy "very close to the liquid surface". As Okefenokee says, there is a BIG acoustic impeadance mis-match unlesss there is direct coupling. Hard to believe enough acoustic energy to cause cavitation could...

Hi kalkish! Welcome here to Physics Forums. At first sight I'd say, No, lightwaves do not affect sound waves. But just be sure, can you please explain in more detail or post the reference you used? There may be more science (physics) underlying this. Cheers, Bobbywhy