Darren New wrote:

> In other news, both feathers and hammers fall at the same speed in 
> airless conditions.

Just once, I'd like to verify this experimentally...

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

Post a reply to this message

Eero Ahonen wrote:
> Stephen wrote:
>> Do you call that an argument? LOL
> 
> No, I call that a partly definition.
> 

:D

>> From my memory of mechanics at school, hp was more an advertising unit ;)
>> Bloody farmers couldn’t tell an erg from an egg :-)
> 
> Hp can be misleading, since it can mean lots of different hp's. It can
> be either SAE or DIN and from the crankshaft or from the tires etc.
> 

Well I probably don’t think of hp as being anything as other than what 
non-technical people say. Who knows what work a horse can do nowadays? 
If the health and safety or animal welfare people allow it ;)

-- 

Best Regards,
	Stephen

Post a reply to this message

Orchid XP v8 wrote:
> Just once, I'd like to verify this experimentally...

http://www.youtube.com/watch?v=5C5_dOEyAfk

Of course, it wouldn't be *that* hard to do on earth.

-- 
Darren New, San Diego CA, USA (PST)
   Forget "focus follows mouse." When do
   I get "focus follows gaze"?

Post a reply to this message

>> Just once, I'd like to verify this experimentally...
> 
> http://www.youtube.com/watch?v=5C5_dOEyAfk

So much for "they did it on a soundstage and slowed it down". :-P

> Of course, it wouldn't be *that* hard to do on earth.

Yeah, because a high vacuum is easy to come by. Oh, wait...

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

Post a reply to this message

Darren New wrote:
> Orchid XP v8 wrote:
>> Just once, I'd like to verify this experimentally...
> 
> http://www.youtube.com/watch?v=5C5_dOEyAfk
> 
> Of course, it wouldn't be *that* hard to do on earth.
> 

I've seen a demo of this in a few science museums.  It's pretty nifty, 
but in the vacuum they both fall fast enough that you don't really get 
to look at it for long.

Post a reply to this message

Orchid XP v8 wrote:
> Yeah, because a high vacuum is easy to come by. Oh, wait...

Well, yeah, it is.  It's called a bell jar.

http://www.youtube.com/watch?v=_XJcZ-KoL9o
(Note - the next video after the one I posted.)

You can go to edmond's scientific and buy bottles of vacuum for like a 
quarter each, too.  It's not like you need interstellar-space vacuum to 
prove the point.

-- 
Darren New, San Diego CA, USA (PST)
   Forget "focus follows mouse." When do
   I get "focus follows gaze"?

Post a reply to this message

>> Yeah, because a high vacuum is easy to come by. Oh, wait...
> 
> Well, yeah, it is.  It's called a bell jar.

You'd need a pretty damned big bell jar to drop an object any 
significant distance.

> You can go to edmond's scientific and buy bottles of vacuum for like a 
> quarter each, too.

Really?


The London Science Museum has a bell inside a jar with a vacuum pump. 
But last I checked, a pump powerful enough to create anything you could 
describe as "a vacuum" is an extremely expensive piece of scientific 
equipment.

Post a reply to this message

Stephen wrote:
> 
> Well I probably don’t think of hp as being anything as other than what
> non-technical people say. Who knows what work a horse can do nowadays?
> If the health and safety or animal welfare people allow it ;)
> 

In that, my friend, you are absolutely right.

-Aero

Post a reply to this message

Invisible wrote:
> You'd need a pretty damned big bell jar to drop an object any 
> significant distance.

Somewhat larger than the distance it takes to see a feather and a ball 
bearing falling at different speeds in atmosphere.

>> You can go to edmond's scientific and buy bottles of vacuum for like a 
>> quarter each, too.
> 
> Really?

Yes. Ever get blood drawn? How do you think that works?

> But last I checked, a pump powerful enough to create anything you could 
> describe as "a vacuum" is an extremely expensive piece of scientific 
> equipment.

http://www.google.com/products?q=vacuum+pumps+for+sale

Even the $25 pump gets you down to 29" of vacuum.

-- 
Darren New, San Diego CA, USA (PST)
   Forget "focus follows mouse." When do
   I get "focus follows gaze"?

Post a reply to this message

> Yes. Ever get blood drawn? How do you think that works?

Presumably they just use a syringe. I wasn't looking at the time; I was 
in far too much pain...

>> But last I checked, a pump powerful enough to create anything you 
>> could describe as "a vacuum" is an extremely expensive piece of 
>> scientific equipment.
> 
> http://www.google.com/products?q=vacuum+pumps+for+sale
> 
> Even the $25 pump gets you down to 29" of vacuum.

Interesting. I wonder what it costs to buy a large container than can 
withstand several thousand Newtons of force trying to crush it...

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

Post a reply to this message