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Coriolis Effect (Force)
Once the air begins to move along the PGF, a second "apparent" force called the Coriolis Effect or Coriolis Force (CF) causes the air to deflect from its initial path. In the northern hemisphere, the CF-induced deflection is 90o to the right of the intended path. In the southern hemisphere, the CF-induced deflection is 90o to the left of the intended path. The Coriolis Force is caused by the rotation of the earth.
(View this example multimedia file [1 Mb])
As with any force that causes an object to be displaced (moved), the amount of displacement will be a function of the time that that force has been exerted on the object. At zero time, there would be no movement due to the force. As time increases, there would be a more noticeable displacement. The Coriolis force is a VERY WEAK force so it takes a fairly long time for one to notice its effects!
Therefore, the Coriolis Effect only occurs when a freely moving object travels a large distance (i.e. travels a long time.) An example would be air that is moving over hundreds of miles which takes many hours to do. Contrary to public belief, water draining in a sink is NOT affected by CF because there is not enough time for the Coriolis force to cause a noticeable displacement. Read the TRUTH ABOUT CORIOLIS
When PGF and CF act upon an air parcel, the resulting wind direction will be parallel to drawn isobars with lower isobars to the left of the wind in the northern hemisphere. Another way to imagine the wind in relation to pressure is to place one's back to the wind, sticking out the left arm. The left arm would point to lower pressure in the northern hemisphere.
Because flow is parallel to isobars, air around the center of a high pressure system in the northern hemisphere flows clockwise. Air around the center of a low pressure system in the northern hemisphere flows counter-clockwise. Direction of flow is reversed in the southern hemisphere since CF acts to the left of the wind.
If just PGF and CF are considered, air from a high pressure region can not move toward a low pressure region, thereby not allowing the atmospheric pressure to balance. It takes friction at the surface of the earth to achieve this pressure balance.
Originally posted by XXXN3O
reply to post by Glargod
This is how you know when you have really woken up.
When you are even noticing what way the toilet flushes!!
Originally posted by miniatus
reply to post by darrman
My sentiments exactly .. my first thoughts won't be posted..
I will however say, video or it didn't happen
Originally posted by MzMorbid
How many people read this and then got up to go check out which direction their toilet water swirls?
Originally posted by miniatus
reply to post by Glargod
Good point..
We need a video, while holding up a local newspaper ( yes, while rare these creatures still exist )
Originally posted by MzMorbid
How many people read this and then got up to go check out which direction their toilet water swirls?
Originally posted by Destinyone
Originally posted by XXXN3O
reply to post by Glargod
This is how you know when you have really woken up.
When you are even noticing what way the toilet flushes!!
And you post it on a Conspiracy Website.....
Originally posted by cerebralassassins
Originally posted by Destinyone
Originally posted by XXXN3O
reply to post by Glargod
This is how you know when you have really woken up.
When you are even noticing what way the toilet flushes!!
And you post it on a Conspiracy Website.....
considering that my neighbors cat simply sits on the lawn and just stares at me all day when i work makes me think if i too should go and notice my toilet flushing.
Originally posted by XXXN3O
Originally posted by cerebralassassins
Originally posted by Destinyone
Originally posted by XXXN3O
reply to post by Glargod
This is how you know when you have really woken up.
When you are even noticing what way the toilet flushes!!
And you post it on a Conspiracy Website.....
considering that my neighbors cat simply sits on the lawn and just stares at me all day when i work makes me think if i too should go and notice my toilet flushing.
Even worse...
My cat uses the toilet!
I am starting to realise that there is more to this than meets the flush!edit on 27-12-2011 by XXXN3O because: (no reason given)