I bet you didn't know that this thread would have a part 2

mzungu wrote: »

Cheetahs can't roar. They can only meow like domestic house cats.....

We all know that the cheetah is the fastest land mammal. But its also the fastest accelerating land mammal. In a single stride cheetahs can tack on an extra 7 mph, and at their peak the big cats accelerate at a rate of slightly more than 1 g—meaning they accelerate at roughly the speed of a falling rock.

Greyhounds are the second-fastest land accelerator, can post about 0.7 g's

cdeb wrote: »

The singer Cher's mum is still alive. Cher is 73, and her mum is 93.

Were her mum's mum still alive, she'd be 106. She was 13 when Cher's mum was born; the father was 21.

I used to work with a man in his 80s in a clothes shop in Kilkenny (he used to cycle to work every day), and his mother died around that time.

Carry wrote: »

Fourier, go on

I might get this on a t shirt.....a tattoo is too much I think:D

Carry wrote: »

Might take some time because work is looming and needs preparations too.

Fourier, go on

There has actually been quite a debate on whether the planets influence sunspots for roughly 250 years. There was a planetary alignment of all the solar system's gas giants in 1804 that corresponded to a sunspot maximum, but the maximum in 1788 occurred when the gas giants were completely unaligned. So by the 1900s people thought sunspots has nothing to do with planets. However questions about it opened up again in the 1970s when some possible connections with sunspots and Jupiter were seen and it has never really been settled. Until now (maybe!)

Recently a German group did actually show a pretty tight correlation between the orbits of Earth, Venus and Jupiter and the cycle of sunspot activity. Earlier studies in the 1900s had always focused on the gas giants alone being the cause. The new German study confirms part of this, there is little relation between the sunspots and what Saturn, Neptune and Uranus are doing. However it shows those studies were flawed because they ignored the closer large rocky planets: Venus and Earth.

Sunspots happen when a plasma current in the Sun moves in such a way that it generates a powerful magnetic field in a given region. This magnetic field then slows nearby plasma currents just beneath the surface by trapping them in place. Since these currents are what carry energy to the surface of the Sun, this means less energy reaches the surface. So the surface plasma begins to cool and go dark. Solar plasma is made of hydrogen which gets more transparent the cooler it is. So the colder plasma in a sunspot becomes transparent and lets us see deeper into the Sun. Which is why they're useful scientifically as we then get to study the deeper plasma layers.

What seems to be happening with the planets is that Earth, Venus and Jupiter together essentially cause tides in the Sun's plasma that then set up poorly understood types of plasma currents beneath the surface. These currents then generate the massive magnetic fields that trap other plasma currents near by.

I'll just say that all of this still isn't very well understood. Fluids of any kind are the hardest physical systems to model mathematically, so we don't know precisely how the tides caused by planets get the plasma moving the right way. In fact we still don't really know what kinds of plasma flows create these super strong magnetic fields and what types just have a weak magnetic field.

It might sound odd but the motion of your coffee when you stir it with a spoon is far more mathematically complex than a black hole and takes some heavy duty mathematics. Oddly very abstract things like black holes are often much simpler than everyday things like fluids. You can win a million for example for showing the equation that would describe a coffee can actually be solved at all:
https://en.wikipedia.org/wiki/Navier%E2%80%93Stokes_existence_and_smoothness

Buford T. Justice VI wrote: »

Ken Ring?

I'm not sure. I could be confusing him with someone else.


From his Wiki

Ring is known for attempting to predict weather and authors books on "how the moon affects the weather", which include an almanac each year for New Zealand (since 1999), Australia (since 2006) and Ireland (since 2010).[13][14] He believes that the cycle of weather follows a lunar pattern and can be used to predict weather many years in advance.[15] The lunar cycle occurs every 9 years,[16] while the solar cycle repeats at 11 year intervals[17] and by assessing the two Ring believes that the weather recycles through a 355-day cycle, a 19-year cycle, and a 36-year cycle.[1] According to his website it is not an exact science - it's not scientific at all[original research?] - and is opinion-based similar to economics or political science or astrology and his rainfall predictions can be out by 24 hours and a radius of 50 to 60 miles (80 to 97 km).

That states that he uses Lunar Cycles and not Sun Spots and is not scientific. The guy that I hazily remember definitely said he used Sun Spots and was based in science.

Speaking of planets the planets in the solar system do not orbit the sun. they orbit the center of mass of all the objects in the solar system which just happens to the be very close to the sun. this point is called the barycenter

On a slightly different note, did you know Robert Liston was the only surgeon with a 300% mortality rate for the one operation?

He performed an amputation of a patients leg, lopped off two of his assistants fingers, both died of sepsis. An observer also died of a heart attack.

https://allthatsinteresting.com/robert-liston