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(77 posts)
28. 2 high tides every day: Theory of Gravity disproved! Flat earthers confused.
Sun Jul 24, 2022, 07:36 PM
Jul 2022

There is an annotated version that explains many of the jokes:

"The existence of tides is often taken as a proof of gravity, but this is logically flawed. Because if the moon’s “gravity” were responsible for a bulge underneath it, then how can anyone explain a high tide on the opposite side of the earth at the same time? Anyone can observe that there are two-not just one-high tides every day. It is far more likely that tides were given us by an Intelligent Creator long ago and they have been with us ever since. In any case, two high tides falsifies gravity.

"The gravitational force(1) depends upon the mass of each object and upon the distance between the objects. The closer they are to each other, the more strongly they attract. In the case of the moon and the earth, the moon pulls the ocean water on the nearer side of the earth more strongly than it pulls the rest of the earth, so the water forms a bulge. On the far side of the earth, the water experiences the least pull because it is farthest from the moon. The rest of the earth is pulled away from the far-side water, leaving a bulge of water opposite to the moon, though this bulge is not quite as large as the first one.(6) The moon holds these bulges (more or less) in place while the earth rotates beneath them. The net effect is the tides we experience at the seashore. By the way, there are also small land tides--these are about a centimeter."

A very complete explanation of the tides is presented here.(7)
(5) Observant readers might ask, if the earth-moon center of mass
system is constant in its path around the sun (ignoring perturbations
from Jupiter, et al.), then doesn’t the earth wiggle a little in its
path? The answer is yes, the ripple in the earth’s path is similar to
that from above, but even smaller. The center of mass in the
earth-moon system is about 1000 miles under our feet (when the moon is overhead), or about ¾ of the way from earth’s center.

(6) High and low tides often have a time delay from when the moon is
overhead. For example, it takes 2-4 hours to fill/empty San Francisco
Bay through the Golden Gate. Cf. high tide on the Pacific side of the
peninsula vs. San Jose.
The author of this parody on creationists is Dr Ellery Schempp--who originated the landmark Supreme Court case that stopped Bible-reading and prayer in public schools (1963). See Wiki.

Cool, I want to check this out. 2naSalit Jul 2022 #1
I Thought The Same! ProfessorGAC Jul 2022 #20
Isaac Newton knew "infinitesimals"-never observed- are a fraud pirsquared Jul 2022 #24
The bit about two tides per day not making sense is especially interesting. Towlie Jul 2022 #25
2 high tides every day: Theory of Gravity disproved! Flat earthers confused. pirsquared Jul 2022 #28
I'm hoping it will help me learn it... 2naSalit Jul 2022 #32
Thanks for posting. n/t John1956PA Jul 2022 #2
Thanks Lochloosa Jul 2022 #3
K&R n/t Alice Kramden Jul 2022 #4
I must've lucked out and had a teacher who learned from that system (book)... Hugin Jul 2022 #5
Old textbooks cost almost nothing and sometimes covered math from K-12 in one cheap book lostnfound Jul 2022 #6
where's those ebooks they said we would be using by now? mopinko Jul 2022 #8
Some teachers and professors have abandoned traditional textbooks. hunter Jul 2022 #19
I See That A Lot! ProfessorGAC Jul 2022 #21
They found a way to charge for those, too Sympthsical Jul 2022 #30
ThNks! That's terrific! PCIntern Jul 2022 #7
Math: The language of measuring sanatanadharma Jul 2022 #9
du dweller Jul 2022 #10
That's a lot to ponder. n/t Harker Jul 2022 #16
When AI enables us to speak to a computer to solve problems in math BSdetect Jul 2022 #11
Everybody uses calculators and computers now. hunter Jul 2022 #27
K&R, Simple explanations from someone who understands the subject are usually the best !! uponit7771 Jul 2022 #12
At the age of 47 I took calculus for fun. PoindexterOglethorpe Jul 2022 #13
I took it between my junior and senior years. Igel Jul 2022 #17
I think its because you care jcgoldie Jul 2022 #34
True. PoindexterOglethorpe Jul 2022 #36
Awesome Johnny2X2X Jul 2022 #14
Excellent, thanks for posting. K&R. c-rational Jul 2022 #15
I had a multivariable calculus professor (for my 3rd semester of calc) BumRushDaShow Jul 2022 #18
The print. Really? And some of us are visual learners. Baitball Blogger Jul 2022 #22
It is an excellent and well known textbook. dalton99a Jul 2022 #23
TY! n/t EndlessWire Jul 2022 #26
Hey, gang, it's at Gutenberg! ironflange Jul 2022 #29
Now let's get colleges to use books like this when they teach their courses... Silent3 Jul 2022 #31
This doesn't surprise me at all jobendorfer Jul 2022 #33
Cool link thanks! perfessor Jul 2022 #35
Would be outlawed in Florida. Why they even have a whole chapter called Integration! retread Jul 2022 #37
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