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Science videos

Any topic related to science can be discussed here.
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Dave B
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Re: Science videos

#61 Post by Dave B » May 23rd, 2011, 6:23 pm

Latest post of the previous page:

Alan H wrote:
Dave B wrote:I have sent the link off to Carole's trainbrain son, suggesting he build a model of it!
With Lego?
If they make N gauge scale Leggo yes . . . (might need a microscope though.)
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
Me, 2015

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Dave B
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Re: Science videos

#62 Post by Dave B » May 23rd, 2011, 8:12 pm

I could not work out where this fits but since it's about science . . .
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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Gottard
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Re: Science videos

#63 Post by Gottard » May 25th, 2011, 5:13 pm

:pointlaugh: :thumbsup:
The only thing I fear of death is regret if I couldn’t complete my learning experience

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Alan H
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Re: Science videos

#64 Post by Alan H » June 13th, 2011, 12:36 am

Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

Fia
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Re: Science videos

#65 Post by Fia » June 13th, 2011, 8:11 pm

:thumbsup: despite being very grey...

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Alan H
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Re: Science videos

#66 Post by Alan H » June 17th, 2011, 12:13 am

Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

Gottard
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Joined: October 3rd, 2008, 3:11 pm

Re: Science videos

#67 Post by Gottard » June 17th, 2011, 4:38 pm

Either extraordinary or a doctored film :puzzled:
The only thing I fear of death is regret if I couldn’t complete my learning experience

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Dave B
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Re: Science videos

#68 Post by Dave B » June 17th, 2011, 5:11 pm

I was worried by it, but have trouble putting my finger on why. T

a) The light mass of such a model would make it very susceptible to any vagrancies of the wind, making predictive control difficult.
b) The speed and the low altitude at times meant that the controller would need very, very fast reaction times.
c) Unless he could reverse the pitch of the blades no chopper can fly in the modes that that model did.
d) Even if he could reverse the pitch inertia and momentum would have made it very difficult to achieve some of the reverses.
c) Adding reverse pitch controls would make things even more difficult than with normal (not easy) helicopter controls - bit like rubbing your tum and patting your head whilst hopping backwards on one leg with your eyes closed (try it!)

On might go on, I have forgotten most of by dynamics and aerodynamics. It just felt very false.
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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Alan H
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Re: Science videos

#69 Post by Alan H » June 17th, 2011, 6:55 pm

I have been assured it is 100% genuine from someone who flies model helicopters, has seen this guy flying them and is thinking of getting the same one himself. Extraordinary as it may seem, I believe it is not faked in any way!
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Dave B
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Re: Science videos

#70 Post by Dave B » June 17th, 2011, 7:05 pm

OK, then he is a very able model controller.

(Still wanna know how it flies upside down!)
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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Alan H
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Re: Science videos

#71 Post by Alan H » June 20th, 2011, 8:34 pm

This time, in the dark.
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Alan H
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Re: Science videos

#72 Post by Alan H » June 21st, 2011, 10:42 pm

Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Dave B
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Re: Science videos

#73 Post by Dave B » June 22nd, 2011, 9:15 am

Clever.

I am guessing that there are actuators behind the elements driven from a video cam. Watching "Weave Mirror" you get a glimpse of these at the edge of the mirror towards the end of the clip.

But still clever.
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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Alan H
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Re: Science videos

#74 Post by Alan H » September 12th, 2011, 9:31 pm

Not really a video, but...

The Scale of the Universe
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Dave B
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Re: Science videos

#75 Post by Dave B » September 12th, 2011, 9:51 pm

Great, Alan! The two things that surprised me were the smallest of the CD pit and the largeness of the giant earth worm!

I have a book that has pictures of stars as comparatives in terms of seize, there are so mighty big stars out there - make the Sun look like a sparkle off a sparkler.
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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Fia
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Re: Science videos

#76 Post by Fia » September 12th, 2011, 10:15 pm

I liked this too. Scale is darn hard to comprehend. I have a newspaper cutting of a solar flare pic on my kitchen wall and recently tried to show my youngest the approximate scale:

Image

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Alan H
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Re: Science videos

#77 Post by Alan H » September 13th, 2011, 10:20 am

Wow!
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Alan H
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Joined: July 3rd, 2007, 10:26 pm

Re: Science videos

#78 Post by Alan H » September 13th, 2011, 9:28 pm

The light of life

Sometimes the simplest of solutions are the best.
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Dave B
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Joined: May 17th, 2010, 9:15 pm

Re: Science videos

#79 Post by Dave B » September 13th, 2011, 10:36 pm

Just the kind of application of science I really like!
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
Me, 2015

Gottard
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Joined: October 3rd, 2008, 3:11 pm

Re: Science videos

#80 Post by Gottard » September 14th, 2011, 11:19 am

Alan H wrote:The light of life

Sometimes the simplest of solutions are the best.
True! and great!
The only thing I fear of death is regret if I couldn’t complete my learning experience

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Sel
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Joined: January 3rd, 2011, 3:53 pm

Re: Science videos

#81 Post by Sel » September 14th, 2011, 3:48 pm

Alan H wrote:The light of life

Sometimes the simplest of solutions are the best.
Wow. Amazing.
"The good life is one inspired by love and guided by knowledge." Bertrand Russell

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