In 1964, noted astronomer Fred Hoyle wrote prophetically:
"More and more the professions will cross over into the entertainment field. Those of us who are not employed directly in industry will come to realize that what we are really in is 'show biz."
As now evidenced by all those YouTube videos with which we are bombarded!
"More and more the professions will cross over into the entertainment field. Those of us who are not employed directly in industry will come to realize that what we are really in is 'show biz."
As now evidenced by all those YouTube videos with which we are bombarded!
I've invented a new system of mathematics, Steve.
It's much simpler than doing it the hard way! 🤓
In the beginning, God said, ‘Let there be 1!’ and there was hydrogen. Then He said, ‘Let there be 2!’ and there was deuterium. He kept counting like this, and there was tritium and helium-3 (3 nucleons in each nucleus), helium-4 (4 nucleons), then he left the rest to Hoyle as an exercise for the student. 🙂
I find the Bohr Hydrogen atom interesting enough, though I know a bit of Chemistry:
https://en.wikipedia.org/wiki/Bohr_model
See it's simple. But contains the Quantum.
Tides are interesting too. Why are there two high tides a day? Not many people think about it. 🙂
https://en.wikipedia.org/wiki/Bohr_model
See it's simple. But contains the Quantum.
Tides are interesting too. Why are there two high tides a day? Not many people think about it. 🙂
I won't "Bohr" anyone with the answer to the two high tides a day question (HINT - the Moon doesn't really rotate around the Earth), other than to say that some areas get three or only one or even none at all!
As Bill O'Reilly says, “Tide goes in, tide goes out. Never a miscommunication. You can’t explain that. You can’t explain why the tide goes in.”
Take that science!
The tidal forces are explained visually here:
And there are two high tides a day, disregarding some local effects caused by islands like our own Isle of Wight.
I was at a dinner party where I was the only person to know the right answer out of 12 bright but unscientific guests. It ran for 4 days before everyone came round to my way of thinking.
Initially the whole table poo-poohed the notion. They thought there was just one attracted by the moon and less so the Sun. Even though I live by the sea and choose my swimming times for mid tide to avoid fast currents.
Some people see the second tide as caused by centrifugal force, but that is not quite right.
Tidal forces fall off as the third power with distance, not inverse square as with Gravity, and the Moon feels much stronger tidal forces than the Earth.
Einstein used the word centrifugal in his General Relativity paper to visualise some frame-dragging forces due to rotation.
And there are two high tides a day, disregarding some local effects caused by islands like our own Isle of Wight.
I was at a dinner party where I was the only person to know the right answer out of 12 bright but unscientific guests. It ran for 4 days before everyone came round to my way of thinking.
Initially the whole table poo-poohed the notion. They thought there was just one attracted by the moon and less so the Sun. Even though I live by the sea and choose my swimming times for mid tide to avoid fast currents.
Some people see the second tide as caused by centrifugal force, but that is not quite right.
Tidal forces fall off as the third power with distance, not inverse square as with Gravity, and the Moon feels much stronger tidal forces than the Earth.
Einstein used the word centrifugal in his General Relativity paper to visualise some frame-dragging forces due to rotation.
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I hadn't thought about how the Flat Earthers attempt to explain tides!
https://flatearthdeception.com/flat-earthers-say-land-moves-up-and-down-to-cause-ocean-tides/
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At the risk of becoming a 'tidal bore', I offer Donald E. Simanek's take on the topic.
He explains that the tidal forces (shown by the vectors in the attached diagram) act on the Earth's volume in two ways:
(1) They stretch the "solid" earth along the earth-moon line, and (2) they move water, toward the earth-moon line.
"The second effect is dominant for ocean water, since water is nearly incompressible. It does not compress or stretch, but it is easily pushed around. The tidal forces push water toward the tidal bulges. Outside of the bulge the ocean surface is lowered."
Simanek says:
"While gravitational forces depend on the inverse square of distance, these tidal forces, being differences in force over length (ΔF/Δx), depend on the inverse cube of distance. That's why tidal forces on earth due to the sun are much smaller than those due to the moon."
https://dsimanek.vialattea.net/scenario/tides101.htm
He explains that the tidal forces (shown by the vectors in the attached diagram) act on the Earth's volume in two ways:
(1) They stretch the "solid" earth along the earth-moon line, and (2) they move water, toward the earth-moon line.
"The second effect is dominant for ocean water, since water is nearly incompressible. It does not compress or stretch, but it is easily pushed around. The tidal forces push water toward the tidal bulges. Outside of the bulge the ocean surface is lowered."
Simanek says:
"While gravitational forces depend on the inverse square of distance, these tidal forces, being differences in force over length (ΔF/Δx), depend on the inverse cube of distance. That's why tidal forces on earth due to the sun are much smaller than those due to the moon."
https://dsimanek.vialattea.net/scenario/tides101.htm
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