2,396 reputation
321
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location Seattle, WA
age
visits member for 1 year, 9 months
seen Jul 17 at 16:07

I participate on this site because I really enjoy physics and because I would like to learn more about what makes an online community work well. Questions often interest me more than answers – although I think the best answers are grounded in observation and experiment. I’m optimistic that there are still many surprising discoveries yet to be made in the physical sciences. I believe physicists should be good citizens. I believe my children will know things about the natural world I can’t even imagine – and will learn them in ways quite different than how I was educated.


Feb
22
asked How does the construction of a hydrophone differ from a microphone?
Feb
22
answered The physics of sound boards
Feb
21
accepted How do wind turbines cause lightning?
Feb
20
comment How do wind turbines cause lightning?
Good explanation of what the phrase "...outrun the corona.." was referring to. I had not thought that an ionization layer dampens the electric field and might become thinned by flow around the blade.
Feb
20
asked How do wind turbines cause lightning?
Feb
12
comment Does the foam on top of boiling maple sap affect the rate of evaporation?
Old timers are notoriously unreliable :) I'd guess it actually makes no difference.
Feb
8
awarded  Custodian
Feb
6
comment Liquid with freezing point above 0 Celsius that could be use at ice rinks
Synthetic ice technology is already in use in places such as Disneyland- but water is much likely less expensive.
Feb
4
comment Considerations and questions for a DIY heat pipe; how to choose a working fluid?
My first job was with an outfit that built heat pipes. Methanol was used.
Feb
3
answered Can stress be observed directly?
Feb
1
comment Speed of sound in non-newtonian fluids
@simplelikeanegg shows below that the velocity of sound waves in a fluid doesn't depend upon viscosity. But as aside, seismic waves traveling through rock are affected by non-linear elastic moduli.
Feb
1
answered Why is acceleration expressed as m/s/s?
Jan
31
answered Tension in string due to surface tension
Jan
31
comment Determining a person's sight from his speech
Puzzles can be cool, but if I needed to determine if someone needed eyeglasses I'd ask the to read an eye chart. I think you have another way in mind.
Jan
31
comment Improving our homemade hot tub design?
Stirring should help, but perhaps not enough to notice :(
Jan
31
comment Determining a person's sight from his speech
If this is about physics, more explanation would be helpful. Are you asking whether its possible to evaluate vision without administering an eye test?
Jan
30
comment Could geothermal energy extraction in Yellowstone significantly diminish the threat of a supervolcano?
There are at least three questions here: 1) geothermal energy extraction, 2) volcanic hazard mitigation, and 3) super-volcanos. An answer to one of these alone would be difficult enough, and providing a sensible answer to a single case of all three may not be possible here. There is a lot of science and engineering efforts applied to each of the three individually - you might consider narrowing the scope of your questions. @mart's answer is valid, but I think one shouldn't take it to mean that the possibility of these ideas is somehow ruled out by physics.
Jan
30
revised Could geothermal energy extraction in Yellowstone significantly diminish the threat of a supervolcano?
please add geophysics tag because geothermal is in this discipline
Jan
26
answered How about retrodiction, if climate prediction is difficult?
Jan
25
revised Can a small change in the Earth temperature give rise to large-scale climate changes?
l think this should have geophysics tag