D
I regard earth as stationary because a) I have never sensed any motion or rotation unless drunk/ill/jumped on a roundabout , and b) scientific experiment has not detected any movement or rotation .Center, maybe, but I don't see how it could be stationary. Terminal velocity would not exist (not a theory) as it would be weight/mass based on how fast an object falls, hence the gravity argument, but it also holds for an object moving in 1 direction at a constant rate.
Isn't terminal velocity dictated by the density of the medium through which an object moves? Why are you insisting that gravity is mass based?
Sorry if I misunderstood the point you were making . I'm confused here . 9.8m/s/s is an acceleration not a velocity , which would be 9,8m/s.No, that is why a feather and a bowling ball will both fall at the same rate of speed (ie. terminal velocity) in a vacuum (again not theory proven).
Did not insist that gravity was mass based, but was instead saying if gravity doesn't exist, and we exist on a flat plane, that we couldn't be stationary due to terminal velocity.
If the velocity in which an object falls on a flat, stationary plane, is based upon the mass, then they would fall at different rates of speed. Even objects propelled at first actually slow down to the good ole 9.8m/s/s.
If that flat plane were moving upward however, like an elevator, at a constant speed. That would give an object a terminal velocity.
In his book “South Sea Voyages,” Arctic and Antarctic explorer Sir James Clarke Ross, described his experience on the night of November 27th, 1839 and his conclusion that the Earth must be motionless: “The sky being very clear, the planet Venus was seen near the zenith, notwithstanding the brightness of the meridian sun. It enabled us to observe the higher stratum of clouds to be moving in an exactly opposite direction to that of the wind--a circumstance which is frequently recorded in our meteorological journal both in the north-east and south-east trades, and has also often been observed by former voyagers. Captain Basil Hall witnessed it from the summit of the Peak of Teneriffe; and Count Strzelechi, on ascending the volcanic mountain of Kiranea, in Owhyhee, reached at 4000 feet an elevation above that of the trade wind, and experienced the influence of an opposite current of air of a different hygrometric and thermometric condition … Count Strzelechi further informed me of the following seemingly anomalous circumstance--that at the height of 6000 feet he found the current of air blowing at right angles to both the lower strata, also of a different hygrometric and thermometric condition, but warmer than the inter-stratum. Such a state of the atmosphere is compatible only with the fact which other evidence has demonstrated, that the earth is at rest."
Surely terminal velocity depends on the surrounding medium and amount of drag on the falling object (shape related).
This passage from this thread bears reading.
Actual people writing out their experiences and observations of the physical world.
So James Clark Ross and the other chaps observations are not trustworthy because reasons but those attributed to a man called Galileo are!An interesting passage, and it speaks of the arctic and Antarctic regions, but nothing different about the Earth's shape, Antarctica not being a continent according to FE models, or anything of the such, so how could anything else written by them be trusted?
No one has ever measured the sun's diameter , the distance to any planet or moon or star . In the heliocentric system its all done by assumption .
So James Clark Ross and the other chaps observations are not trustworthy because reasons but those attributed to a man called Galileo are!
Right ho!
We cannot and therein lies the rub.how can we trust anything put onto paper really be anyone.
We cannot and therein lies the rub.
All we have are our own experiences of places and phenomena and as we cannot easily get to many places of the earth the best we get after that is accounts of others we know personally. The written record comes in a very poor third as it is chockablock full of lies and misinformation. Probably put there to obfuscate any truths that sneak through for reasons unknown.
Truth is there is no way to know who wrote what or when (maps being a prime product of a behind the scenes map factory I feel as they are more dramatic than acres of text and this is a digital age where few read they prefer to glance at imagery)
No one has measured the speed of light. It's an unproven assumption based on the idea of a heliocentric system based on no evidence. Well based on the Brahe geocentric model with the viewpoint shifted to the sun it appears.That's where the measurement of the speed of light comes into play, gives us at least a measurement of distance.
Sorry, maybe stated incorrectly, guess I basically meant is that how can we trust anything put onto paper really be anyone. There's always some form of agenda out there, transparency doesn't exist.
It really is barking to me how this kind of thing is taken as gospel.the speed of light was first measured in 1676 by a Danish astronomer
Roemer, working at the Paris Observatory, was not looking for the speed of light when he found it. Instead, he was compiling extensive observations of the orbit of Io, the innermost of the four big satellites of Jupiter discovered by Galileo in 1610. By timing the eclipses of Io by Jupiter, Roemer hoped to determine a more accurate value for the satellite’s orbital period.
Was commenting generally not personally.And no, not taking it as gospel, not quite sure how it would be measured way back then with what we are told is limited technology.
Ole Roemer . Took two observations through his scope six months apart assuming earth was millions of miles away from it's original position - Heliocentrism. Geocentric model would say that's just plain parallax .Light was thought to be instantaneous before this time.As is both assumptions, but under one the speed of light was first measured in 1676 by a Danish astronomer. Though not determined a precise speed until the 1920's.
Though as myself and KD were just pointing out, everything written is under question as to whether it is real or not.
But really, how us measuring the speed of light impossible? Heliocentric or geocentric, it still has a speed right? At least from our observations, whether they maybe right/wrong/simulated or otherwise.
Again though, some seem to want to break down and do away with math itself...measurements, that yes we ourselves defined their makeup, to help us better understand things, are still measurements. If 1+1 doesn't equal 2, then please explain this thought pattern to me, am always open and willing to learn as much as I can into my neurons and synapses.
Setup a light sensor and a switch, have the distance between the two measured out, and then turn the light on and with computers it's pretty easy to get an accurate reading of time delay of light on versus light hitting sensor. Viola, speed of light.
Sorry, just seemed pretty basic, not trying to ruffle any feathers.
Calculating the speed of light is not direct measurement of speed of light.
The first measurement of c that didn't make use of the heavens was by Armand Fizeau in 1849. He used a beam of light reflected from a mirror 8 km away. The beam was aimed at the teeth of a rapidly spinning wheel. The speed of the wheel was increased until its motion was such that the light's two-way passage coincided with a movement of the wheel's circumference by one tooth. This gave a value for c of 315,000 km/s. Leon Foucault improved on this result a year later using rotating mirrors, which gave the much more accurate value of 298,000 km/s. His technique was good enough to confirm that light travels slower in water than in air.
But the tech we have today can very precisely measure the speed of light of a laser.
Frankly we can all link and quote so many things, but it's up to others to be able to read and understand things enough to know whether they are fact or fiction.