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ScientificBoysClub(SBC)

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What are the top Myths in Physics ?
« on: 19/09/2009 04:59:00 »
What are the top Myths in Physics ?
Well, do we have any myths in Physics. Which are not busted yet ?
Do we ?
like ..?


 

Offline Mr. Scientist

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What are the top Myths in Physics ?
« Reply #1 on: 19/09/2009 15:06:41 »
What are the top Myths in Physics ?
Well, do we have any myths in Physics. Which are not busted yet ?
Do we ?
like ..?


I will give you something similar to a myth that many people get mistaken on.

When speaking about the big bang, many today believe it was some ''event'' in the past. This is a myth, for the big bang still continues today.

(Just an example)
 

Offline Andrew K Fletcher

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What are the top Myths in Physics ?
« Reply #2 on: 20/09/2009 09:05:41 »
Myth 1.

Water under normal atmospheric pressure in a single open ended tube cannot be raised over 10 metres.


Myth 2. Leaves are responsible for generating a pull that lifts water aver 100 meteres to the canopy of a giant redwood and every other species of tree.

Busted: Leaves fall from deciduous trees leaving them devoid of this magical pull that is not demonstrated anywhwere other than in the heads of the idiots that drempt it up. A naked tree still manages to lift water to the forming buds in the spring. How is this possible using the cohesion tension theory as it stands?

Andrew K Fletcher

 

Offline Bored chemist

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What are the top Myths in Physics ?
« Reply #3 on: 20/09/2009 10:30:46 »
You missed a bit
"Water under normal atmospheric pressure in a single open ended wide tube cannot be raised over 10 metres."

Capillary action helps a lot.
Also, re
"Busted: Leaves fall from deciduous trees leaving them devoid of this magical pull that is not demonstrated anywhwere other than in the heads of the idiots that drempt it up. A naked tree still manages to lift water to the forming buds in the spring. How is this possible using the cohesion tension theory as it stands?"
The leaves don't just die and drop off.  Observant people will notice changes that take place before the leaves are lost- (such as the change in colour).
These changes are include sealing off the ends of the tubes. The theory works just fine in this case.
 

Offline glovesforfoxes

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What are the top Myths in Physics ?
« Reply #4 on: 20/09/2009 10:31:31 »
Quote from: Andrew K Fletcher
Myth 2. Leaves are responsible for generating a pull that lifts water aver 100 meteres to the canopy of a giant redwood and every other species of tree.

please, andrew. do not state this as a myth without support from other scientists and without a wide range of sources. you have been tested heavily on this subject and have not come out on top. this is not a myth, and yes, forum members have already willingly discussed and then dismissed your ideas.

http://www.thenakedscientists.com/forum/index.php?topic=1982.350
 

Offline syhprum

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What are the top Myths in Physics ?
« Reply #5 on: 20/09/2009 10:37:37 »
Another myth

projectiles moving under the influence gravity above a spherical planet at less than escape velocity move in a parabolic path.
 

Offline Andrew K Fletcher

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What are the top Myths in Physics ?
« Reply #6 on: 20/09/2009 11:11:28 »
Quote from: Andrew K Fletcher
Myth 2. Leaves are responsible for generating a pull that lifts water aver 100 meteres to the canopy of a giant redwood and every other species of tree.

please, andrew. do not state this as a myth without support from other scientists and without a wide range of sources. you have been tested heavily on this subject and have not come out on top. this is not a myth, and yes, forum members have already willingly discussed and then dismissed your ideas.

http://www.thenakedscientists.com/forum/index.php?topic=1982.350

http://aob.oxfordjournals.org/cgi/reprint/os-10/4/630.pdf Read Srasburger et al on subject
 

ScientificBoysClub(SBC)

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What are the top Myths in Physics ?
« Reply #7 on: 20/09/2009 11:27:31 »
sir (BC),I would say "Man on the Moon " would be greatest myth !!
What do you think ??
 

Offline Bored chemist

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What are the top Myths in Physics ?
« Reply #8 on: 20/09/2009 15:39:36 »
Quote from: Andrew K Fletcher
Myth 2. Leaves are responsible for generating a pull that lifts water aver 100 meteres to the canopy of a giant redwood and every other species of tree.

please, andrew. do not state this as a myth without support from other scientists and without a wide range of sources. you have been tested heavily on this subject and have not come out on top. this is not a myth, and yes, forum members have already willingly discussed and then dismissed your ideas.

http://www.thenakedscientists.com/forum/index.php?topic=1982.350

http://aob.oxfordjournals.org/cgi/reprint/os-10/4/630.pdf Read Srasburger et al on subject
Andrew, there's a good chance that Srasburger et al's children and grandchildren are dead- never mind their theories.
Do you have anything from this century- or even the last, rather than the one before, that "supports" your ideas?
If so please feel free to post it somewhere apropriate (that's to say, not in this thread).
 

Offline Andrew K Fletcher

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What are the top Myths in Physics ?
« Reply #9 on: 20/09/2009 15:56:23 »
http://aob.oxfordjournals.org/cgi/reprint/os-10/4/630.pdf Read Srasburger et al on subject
Quote
Andrew, there's a good chance that Srasburger et al's children and grandchildren are dead- never mind their theories.
Do you have anything from this century- or even the last, rather than the one before, that "supports" your ideas?
If so please feel free to post it somewhere apropriate (that's to say, not in this thread).

That's the point BC. Strasburger's experiments are conviniently ignored because they cause far too many problems for current attempts to explain water transport in tall trees.
His brilliant experiments are as valid today as they have ever been and his lateral thinking still outstrips all of those involved in plant physiology and fluid transport to this day. After Strasburger's broadside the cohesion tension theory is sunk! No leaves = no cohesion tension theory  Get it?
 

Offline Soul Surfer

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What are the top Myths in Physics ?
« Reply #10 on: 23/09/2009 09:10:31 »
A myth in my book is a story that approximately illustrates life or some fundamental truth without being factually and precisely true.  To this end many of the illustrations used by scientists come into this category but the fact that they are not precisely true under all circumstances does not mean that they are not useful.
« Last Edit: 23/09/2009 22:20:25 by Soul Surfer »
 

Offline Don_1

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What are the top Myths in Physics ?
« Reply #11 on: 23/09/2009 09:22:05 »
Popular myth still held and practiced today by bankers:

1 billion loss = 1 million bonus.
 

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What are the top Myths in Physics ?
« Reply #11 on: 23/09/2009 09:22:05 »

 

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