if the CF causes objects to deflect to the 'RIGHT' of their intended path in the NH, should hurricane and cyclones circulate 'CW' in the NH? why they circulate 'CCW' in the NH? i'm confused :(
@lEtudel This is difficult to explain w/o visual aids, but I'll try anyway. In a low pressure system, air is coming in from everywhere around the system. On a sheet of paper, draw a circle with an L in the center to represent the storm. Now, draw arrows all around the circle pointing to the L. For the NH, the CF is to the right, so on the arrows you just drew, draw more arrows pointing to the right of the direction each original arrow is traveling. You'll notice this causes a CCW spin.
@jintochick 1. Thanks for replying.. but as your explanation, that must cause CW spin. i think we must consider 'pressure gradient force + CF' at each point and draw straight arrows continuously. so if we think the 1st arrow from 6 o'clock to north low pressure, this 1st straight arrow go to the right and think the 2nd arrow from the end of the 1st arrow, this arrow go to the less right due to 'pressure gradient force to the center of hurricane' generally stronger than CF. this causes CCW spin.
If we are moving 1000+mph east, why is the speed of sound the same in both directions and there no apparent doppler effect while standing still on earth and yelling in one direction opposed to another. Because the the air is also moving around 1000+mph east and that is the medium in which sound travels? What about light. Is light moving faster away from us if we shoot a laser to west than if we shoot it to the east???
At 1:54 the narrator announces that an observe sees the ball as traveling straight. This is false. The motion of the rotation of the marry-go-round is perserved even after the ball has been thrown. The ball would still veer of course and thus the path of the ball would curve.
@MetalicStevie Well what's preserved is the velocity of the merry-go-round at the time the ball is thrown. Since to an observer above the merry-go-round there is no force other than gravity (and air resistance) acting on the ball, the horizontal trajectory of the ball is still straight -- except it forms an angle relative to the intended path (it misses the target).
So, the change in angular velocity overwhelms the "linear frame of reference" deflection?
Think of 2 people in a box car moving to the east, with one on either side, throwing the ball back & forth. One is on North side, other is on south side. In a linear frame of motion, the ball will always drift west, regardless of who is throwing it.
The Coriolis effect implies that if the same 2 people were sitting in similar positions in the USA, the balls will go right (throwers perspective)
In effect, the change in angular velocity/copnservation of momentum is the dominant phenomenon.
What I don't undertand is why there will be any deflection on a ball thrown directly east or directly west. There's no change in rotational velocity, so angular momentum should be conserved with no change in velocity (and no deflection/change in direction)
So, why is there any change in direction on easterly or eesterly moving objects (ie, that cause the full circular motion shown on the ride)?
shooting, it's a good question, and although you get the same type of effect, the underlying physics is much different than described in this video for zonal (east-west) movement. It's because a westward moving object is moving slower than the Earth, and an eastward moving object faster than the Earth. Ultimately, you adjust latitude by allowing the centripital acceleration to be sufficient to balance the gravitational force
if the CF causes objects to deflect to the 'RIGHT' of their intended path in the NH, should hurricane and cyclones circulate 'CW' in the NH? why they circulate 'CCW' in the NH? i'm confused :(
lEtudel 2 weeks ago
@lEtudel This is difficult to explain w/o visual aids, but I'll try anyway. In a low pressure system, air is coming in from everywhere around the system. On a sheet of paper, draw a circle with an L in the center to represent the storm. Now, draw arrows all around the circle pointing to the L. For the NH, the CF is to the right, so on the arrows you just drew, draw more arrows pointing to the right of the direction each original arrow is traveling. You'll notice this causes a CCW spin.
jintochick 6 days ago
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@jintochick 1. Thanks for replying.. but as your explanation, that must cause CW spin. i think we must consider 'pressure gradient force + CF' at each point and draw straight arrows continuously. so if we think the 1st arrow from 6 o'clock to north low pressure, this 1st straight arrow go to the right and think the 2nd arrow from the end of the 1st arrow, this arrow go to the less right due to 'pressure gradient force to the center of hurricane' generally stronger than CF. this causes CCW spin.
lEtudel 5 days ago
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@jintochick 2. omg sorry for my bad English. :( hope you understand my English :)
lEtudel 5 days ago
If we are moving 1000+mph east, why is the speed of sound the same in both directions and there no apparent doppler effect while standing still on earth and yelling in one direction opposed to another. Because the the air is also moving around 1000+mph east and that is the medium in which sound travels? What about light. Is light moving faster away from us if we shoot a laser to west than if we shoot it to the east???
TaaastyBurger 2 weeks ago
some great inforamtion here thanks
khijasmith 4 weeks ago
At 1:54 the narrator announces that an observe sees the ball as traveling straight. This is false. The motion of the rotation of the marry-go-round is perserved even after the ball has been thrown. The ball would still veer of course and thus the path of the ball would curve.
MetalicStevie 1 month ago
@MetalicStevie Well what's preserved is the velocity of the merry-go-round at the time the ball is thrown. Since to an observer above the merry-go-round there is no force other than gravity (and air resistance) acting on the ball, the horizontal trajectory of the ball is still straight -- except it forms an angle relative to the intended path (it misses the target).
nnnnakamura 4 weeks ago
some sweet info here
sprattysy 1 month ago
this was a very helpful video to help me understand my homework better. Thanks.
pumkinpie97 1 month ago
Aaah I can't understand these measurements!?! Can someone please explain how many kilometres a "mile" is?
geobiochem 3 months ago
@geobiochem 1km = 0.62 miles
dresdnhope 2 months ago
So, the change in angular velocity overwhelms the "linear frame of reference" deflection?
Think of 2 people in a box car moving to the east, with one on either side, throwing the ball back & forth. One is on North side, other is on south side. In a linear frame of motion, the ball will always drift west, regardless of who is throwing it.
The Coriolis effect implies that if the same 2 people were sitting in similar positions in the USA, the balls will go right (throwers perspective)
shootingnerd 3 months ago
In effect, the change in angular velocity/copnservation of momentum is the dominant phenomenon.
What I don't undertand is why there will be any deflection on a ball thrown directly east or directly west. There's no change in rotational velocity, so angular momentum should be conserved with no change in velocity (and no deflection/change in direction)
So, why is there any change in direction on easterly or eesterly moving objects (ie, that cause the full circular motion shown on the ride)?
shootingnerd 3 months ago
@shootingnerd
shooting, it's a good question, and although you get the same type of effect, the underlying physics is much different than described in this video for zonal (east-west) movement. It's because a westward moving object is moving slower than the Earth, and an eastward moving object faster than the Earth. Ultimately, you adjust latitude by allowing the centripital acceleration to be sufficient to balance the gravitational force
cmc0605 3 months ago
@cmc0605
so ,eg., For eastward movement, the centrifugal force is increased and the body is deflected toward the equator, to the right of the movement
cmc0605 3 months ago
How can I like this video 10 times?
greatwolf85 3 months ago
This video is life altering. I now understand. Thank you
699backstab 3 months ago
the best way to open a beer...(.)(.) BOOBS!!!!
zachman0512 4 months ago
awesome. I get it. Nice demos.
1studmuffin 5 months ago
You think this is a short video? BTW, thanks.
mainchow10 8 months ago
Very Very Good! Thanks very much :)
thomaslianghoising 1 year ago