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DrClaude
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Or North! (Canada, Alaska)JohnNemo said:You could link up with a few other schools at varying distances to the south of you.
Or North! (Canada, Alaska)JohnNemo said:You could link up with a few other schools at varying distances to the south of you.
(And others)JohnNemo said:The further south you are, the lower in the sky the North Star will be, then when you are south of the equator the North Star will not be visible but the Southern Cross will be, getting higher in the sky the further south you go.
(And others)Hamid438 said https://www.physicsforums.com/threads/fun-experiments-to-disprove-flat-earth.941602/page-2#post-5956245 said:I guess for a flat Earth when it is night, it means every where on Earth is at night. We can proof the Earth is round by calling somebody that their time is opposite time to caller. Modern day verification.
Well, yes, there's that... . . However... ?Vanadium 50 said:This sums to 361.203 degrees, not 360.Therefore...
I don't think that even an An-225 could handle that kind of load... .Vanadium 50 said:...the four airports do not lie in a plane.
Tom.G said:Counter argument: It is close by and you are seeing parallax.
OmCheeto said:My calculations tell me that the Seattle to Bremerton ferry will sink about 40 feet by the time it makes it's right turn. Of course, you would have to be watching from water level. Seems like that should be visible with binoculars, or better yet, a camera with a healthy zoom.
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Someone at stackexchange described the experiment. It's the first response to someone's question; "How high up do you have to go before you can sense the curve of the earth?"
I'll have to remember to try and recreate the experiment this summer.
A field trip to the Space Needle would allow comparing visibility distances at ground level and from the observation deck. That would easily confirm that from up top, the boats that from the ground appear to have disappeared into the water can be seen all the way across Puget Sound, and that landmarks completely invisible from the ground come prominently into view as you take the upward Otis ride, and fall back out of view during descent. Perhaps you could add additional learning objectives in re history, architecture, engineering, etc. to help justify the associated effort and expense.accelerandom said:Ah, now I remember reading about the Bedford experiment and atmospheric refraction a few years ago... annoying that that probably makes the Bremerton ferry watching unfeasible. I will work with my student to plan some kind of project that will probably involve Skyping or otherwise communicating people in different latitudes and longitudes and noting the stellar and solar differences between here and there. Thanks again everyone for the suggestions and links.Yes I will, though it may be some time before we have the opportunity to do any of this...
zul8tr said:Ask your students to point to places on a flat map where there have been reports of people and/or animals falling off. Then suggest maybe in the future they go there and observe the edge? Reminds me of the movie "The Gods must be Crazy" where the coke bottle dropped from the sky was a desired thing for all in the clan to own. It eventually was considered to be evil and the main native character was tasked to take the bottle to the end of the Earth and throw it off.
It took over 2000 years to finally nail down (for most) that the sun is the center of our solar system and there are probably some that still do not believe that.
Go figure?
stickman76 said:I would suggest doing the test of Eratostenes. In the classroom, you could use a globe, a light and some matchsticks. Duplicate the experiment and use a ruler to measure the shadows and come up with approximate measurements. Not perfect but it will certainly show that Earth is a sphere, not flat. As an aside, I find it shocking that we are having to debunk 1st century science in 2018. :-)
OmCheeto said:This experiment is making me want to cry.
Yesterday I measured the shadow being 2.10 meters long, by a new method. I think the error was much less than before.
Today I used a different method, and the shadow measured 2.04 meters long.
At this time of year, the shadows should be getting longer.
hmmmm...
I wonder how many times Eratosthenes did this experiment, before he figured out that science is kind of hard.
Best to react with non-wacky videos on Youtube, and there is quite a lot.stickman76 said:wackadoodles on YouTube
Yeah, I heard some clever guys discussing that it might be curved in some way, like a donut.Dr. Courtney said:Wait, it's not flat?
rootone said:Yeah, I heard some clever guys discussing that it might be curved in some way, like a donut.
I recall reading or watching a video or something of the sort about a Flat Earther who "debunked" OmCheeto's argument by...climbing higher with the binoculars Then he claimed, he could still see the entire ship even if it's 10 or so miles into the sea (which apparently contradicts this so called math).ZapperZ said:That's a neat and fun set of observation, @OmCheeto . I've always wanted to do that, but never had the chance.
Now, if only those Flat Earthers actually understand what this all mean.
Zz.
Vanadium 50 said:Two more ideas:
Focault pendulum - shows it's the Earth that rotates and not the stars
Direct measurement via surveying. This looks tricky - the Earth curves at about 8 inches per mile. If you had two towers 20 miles apart you could show that each one is 15 feet lower than the other.
Brilliant!FactChecker said:It would be more fun to offer a $million reward for the person who finds the edge and watch them go around and around. What a GREAT reality/comedy show that would be!