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Topics - fjr66

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1
Flat Earth Debate / Coriolis Effect or Coriolis Force
« on: July 20, 2019, 04:03:59 AM »
According to this blog
https://blog.matthen.com/post/8130807223/you-yellow-need-to-pass-the-red-ball-to-your
If the frame rotating clockwise then the particle path must rotated counterclockwise and vice versa. But on earth cyclone rotated in the same direction with earth direction of rotation. In southern hemisphere cyclone rotated counter clockwise like earth in that part.

This for picture:
https://scijinks.gov/review/coriolis/hurricane-direction.png

2
Flat Earth Debate / Moving direction of Himawari Satellite
« on: July 17, 2019, 06:32:30 AM »


The moon orbitting the earth  once every 30 days. So as the himawari in geostationary orbit (its keeps it  position above the same point on earth surface)  it is must see the moon moving  to the left, not moving to the right. But why in above video its see moon moving to the right, that's means moon orbitting the earth more faster than earth rotated. 

3
Suppose earth surface can drag athmosphere layer above it so it have similar tangetial velocity. But it is still can't have the same angular velocity because it have different distance from the center. So as the distance (altitude) increased, the lag between earth surface and athmospheric  layer above it also increased  as the earth rotated. So athmospheric layer spiraling  out from the earth surface. So why the clound stand still above us and never went to the wast as the earth rotated to the east?

4
Flat Earth Debate / How Aeroplane Follow Earth Curvature
« on: July 09, 2019, 03:47:59 AM »
Yes, gravity can make (center of mass of) the plane follow earth curvature. But how about plane orientation in space. How to make body of the plane always parallel with earth surface without tipping the nose.

5
Flat Earth Debate / How to solve twin paradox in special relativity
« on: July 06, 2019, 12:43:23 PM »
They used many mathematical tweak to solve this paradox but it is still impossible to solve (at least philosophically).
I extended this paradox: If two twin brother Alice and Bob born in planet A. And at the same time both of the twin make a trip to other planets, planet B and C that have similar distance to  planet A but in opposite direction that is Alice go to planet B while Bob go to planet C and both of them have a same velocity relative to the planet A. Then after they returned to planet A who was young?

According to special theory of relativity both of them must observe time dilation of other twin. But when realizing this situation is similar for the twin. Then it is impossible to decide who was younger after returning to planet A. But if there is no twin younger after the trip, then why we used time dilation formula? 

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Flat Earth Debate / Continuous swing of Foucoult Pendulum
« on: July 06, 2019, 10:51:07 AM »
How foucoult pendulum swing for 24 hours in 1861 when there is no  electronic circuit to help it operate?

7
Flat Earth Debate / Proof earth rotation using Gyroscope
« on: July 06, 2019, 08:29:48 AM »
Can gyroscope used as a proof for earth rotation. If yes is there any video (or other resource) about that. I mean the earth rotated about it's axis 15 degree per hour. So the plane of rotation of gyroscope must rotated too with 15 degree per hour.

And it must using manual gyroscope (so we can follow the logic), not electronic gyroscope that can be contain a patch  to make it behave as intended (like make self correction).

8
Flat Earth Debate / Flat Map in Google Map
« on: July 06, 2019, 08:12:09 AM »
If there is satellite that gathered data from every point on earth surface then why google map application using 2D map and make it like 3D perspective. It can be proven that impossible we projected every point in a sphere to 2D map.


9
Flat Earth Debate / Coriolis Effect on Rain particle
« on: July 06, 2019, 01:09:21 AM »
Why doesn't rain experience coriolis effect as it falling down to the earth. Eventhough it is come from altitude with higher linear velocity  than earth surface or athmosphere layer below from where it come (as the earth rotating). So rain must travel in a slightly deflected path to the earth surface.

10
It is obviuous that the air go from one place with high pressure to other place with low pressure, thats make the wind in the earth. In aeroplane they install oxygen mask so when cabin lost the pressure  when something hapened and make leakage in the cabin (the air go to the lower pressure at the outside when the higher latitude the lower the pressure) we  can still breath.

But why during ISS spacewalk, the crew fix something at the outside, and they open the chamber, they (the people left in the inside) can still breath without using the oxygen mask. Whereas at the outside it is a vacuum, so the air go to the outside suddenly to equalize the pressure and it is impossible for them to breath.


11
Flat Earth Debate / Internet from satellite
« on: June 21, 2019, 08:25:02 PM »
In many aeroplane there is WIFI available for passenger wheret it is get internet directly from satellite. But why it is not available for us. Why using BTS tower that needs to dig up the ground for fiber optics connection to work.

12
Flat Earth Debate / How fast the earth rotating when viewed from ISS?
« on: January 29, 2019, 10:12:30 PM »
If ISS orbitting the earth 15 times a day. Then it is equal 1.6 hours per circle. But according to live broadcast from ISS, 1.6 hours is too long for ISS to complete one circle during orbitting the earth.
We neglected correction from earth rotation itself, because it is too small compared to ISS orbitting period.

13
Flat Earth Debate / Dark Velocity
« on: January 10, 2019, 12:27:59 AM »
If we calculate with our own hand (not believe with what the book say), then we get that gravitation pull from the sun to the earth far greater than centrifugal force of the earth to make it stay at orbit. But  the earth never fall to the sun. Does it mean there is "dark velocity"  of the earth during orbitting the sun?

https://en.wikipedia.org/wiki/Centrifugal_force
https://en.wikipedia.org/wiki/Orbital_speed

14
Flat Earth Debate / Altitude for Satellite
« on: December 26, 2018, 09:45:06 PM »
Principal work for many altimeter was using athmospheric pressure that decreasing as we ascend above earth surface. But how about satellite in geostationer orbit. There is no athmosphere in there. How do they determine their altitude? Do they using GPS satellite that orbit below them?

15
Flat Earth Debate / How Radar Detects Near Objects
« on: December 26, 2018, 09:38:47 PM »
Radar operate using electromagnetic waves with speed 3 x 10^8. So if I send radar signal to object at distance 100 m away. Then the signal travel with total distances 200 m. But thats mean travel time for the signal was 200 m / (3 x 10^8 m/s) = 6.67 x 10^-7 second. How to create electronic circuit with capacity to measure such interval of time with high precision. Isn't that the same as measure the speed of light itself?

16
Flat Earth Debate / The Dish for GPS Device
« on: December 26, 2018, 05:26:44 PM »
The dish commonly used to communicate with satellite (like that in TV satellite?). But why does  many GPS device like that in Android phone not have a dish?

17
Flat Earth Debate / Intercontinental ballistic missile
« on: December 26, 2018, 01:32:53 AM »
How does Intercontinental ballistic missile from North Korea hit US? If it is guided by satellite, then why US government let the wrong satellite orbitting above their home land?
https://en.wikipedia.org/wiki/Intercontinental_ballistic_missile

18
When there is electric charge, then there is an electric field in space aorund it. Or when the electric charge is moving (without acceleration), then it is produced magnetic field in a space around it. Both of these fields permeated to infinity according to  Maxwell theory. But how fast electromagnetic field permeated? Is that faster than electromagnetic waves produced by accelerating charge? How possible electromagentic waves with speed c traveling without there is electromagnetic field in the first place (as per definition)?

19
There are three part of the comet: nucleus, coma, and tail. I dont understand what mechanism that makes a tail of comet follow the rest of the comet, when the comet just a small object that dont have significant gravity attraction.

20
Flat Earth Debate / Ring Of Asteroid
« on: April 22, 2018, 11:17:27 AM »
Why (ring of) asteroid never fell to the sun when it  does not carry orbital velocity of the sun?

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Flat Earth Debate / Validity Of Inverse Square Law Of Gravity
« on: April 22, 2018, 11:11:30 AM »
If the planet obey the law of gravitation, then why it is just traveling around the sun. Why it never attracted to other planet in solar system. Like Jupiter and Uranus why they never attracted to each other. It is say that this attraction cause precession of perihellion in Mercure, but why just Mercure experienced this, not Jupiter and Saturnus?

22
Flat Earth Debate / Ring Of Saturnus Under Gravity
« on: April 22, 2018, 11:06:58 AM »
The ring of Saturnus experienced gravity from mother planet, but why it never collapse (or falling down)? It is not like the moon that have definite orbital velocity. It is something different.

23
Flat Earth Debate / The Origin Of The Moon
« on: April 16, 2018, 01:45:34 PM »
In order for object to orbitting the planet, its velocity should match the planet orbital velocity. So it is very unlikely for some object that come from very far distant to match earth orbital velocity in the same time it match sun orbital velocity. Moreover this object not just one, but 69 in Jupiter, and many other planet in solar system, and other star system in galaxy and universe have this typical object too, it is very very unlikely. So scientis suggested that the moon created by collision of object from very far distance with earth and this collision created the debris that orbitting the earth.

But there some doubt in my mind,
1) why when this collision happen, the planet not destroyed. 
2) I never heard that such collision will created the debris with stable orbit, for example there is asteroid that hit the earth but it is never created a debris that orbitting the earth.
3) Why a giant gas planet like Jupiter have a solid rock moon. If some solid rock hit the jupiter then it is just fall down to the center of Jupiter.

24
Flat Earth Debate / How to make Satellite Rotate When Orbitting The earth
« on: January 07, 2018, 04:23:57 AM »
The moon rotate when orbitting the earth. The earth also rotating when orbitting the sun, but the earth always tilted in constant angle for long time, thats why the earth experience season. The north pole always facing the same directon (north star or polaris) when orbitting the sun. There is no relation between earth rotation and earth revolution. But how about satellite, it is needed to rotate too in order to make it always facing  the earth. If satellite does not rotate, then it will facing to the dark space for some time like how the pole of earth in six month experience a night.

25
Flat Earth Debate / Why Light Experienced Doppler Shift
« on: January 02, 2018, 02:26:51 AM »
It's already known in physical communities that the velocity of light always constant and not depend on motion of observer or source. But it is also teached to us that there are aslo Doppler shift experienced by light wave like that when measuring  CMB radiation. But for me it is makes a non-sense. If I approaching the light source then the frequence of light I receive become increased, but when receding the light source the frequency of light I receive decreased. But in this two case the wavelength remain constant (or experienced length contraction in the same amount without seeing whether it is receding or approaching). Then the velocity of light not constant for this two case, becase velocity = wavelength x frequency.

26
Flat Earth Debate / Measuring Altitude From Sea Level on Globe Earth
« on: November 03, 2017, 11:56:23 AM »
If earth is flat, we can simple triangulation to calculate our altidude from sea level. But on earth globe how can we achieve this? What is the referencing point to measure the distance from the "sea level" across the globe, especially  if we very far away from the ocean/sea. If we standing on himalaya mountain, is there any referencing point below it to measure our vertical distance from sea level? Because the sea very far away (beyond the horizon)? Or our sea deep penetrate the continent, so we just floating on the sea.

Remember the earth is oblate, so there is no single distance to the center of the earth, (and also we dont know what method used for determine the distance to the center of the earth)

And where is the center of the earth located?

27
Flat Earth Debate / Dish Network For Communication with ISS
« on: November 01, 2017, 09:55:04 AM »
It is already mentioned that ISS orbit the earth 15 times a day, how we design a dish network to stay communicate with it along its path? Are we build a dish in Atlantic Ocean too?
If it just a single dish, what happen with ISS if it lose of commucation with the ground staff.
If ISS using many other satellite in orbit, then how ISS stay communicate  with them, is there any dish  in ISS for that purpose?

28
Flat Earth Debate / Satellite take a Picture In Mars Pole
« on: October 31, 2017, 08:06:27 AM »
It is already know in scientific community that impossible to make a geostationer orbit above a pole. Because in order for satellite to stay above the same point, it need to orbit in equator.

But recently NASA published some news that there is a ice cup in Mars pole. The question is, how they take the picture of it? Is they change the orbit of satellite from geostationer around equator (because it is needed to stay communicated with the Mars rover) to orbit around pole (so it is need to take 90 degree of turn).

And maybe I can relate this question to other interesting thing, how satellite works above high latitude region (like Norway or Sweden) so they can watch a live broadcast. And how this satellite communicate with the satellite in lower latitude (like Spain Or Italy) when there is a live football match. Because they can not stay in the same orbital period.



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Flat Earth Debate / Twin Whirlpool vs Twin Hurricane
« on: October 25, 2017, 09:44:52 AM »
Twin whirlpool rotate in opposite direction because they follow principle of gear system:
This is one example from youtube:
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But Hurricane as far as google concerned, rotate in the same direction. This is one of example given by google
Hurricane Image By google

It is known that hurricane caused by Coriolis Effect, but if the athmosphere itself rotate with the earth, then impossible for us to experience this phenomena. Maybe we can remove this concept from our curriculum. 

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