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Old 09-09-2012, 10:53 AM   #31
pottery beige
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Default Re: Post your science questions here!

Quote:
Originally Posted by JC
What weighs more? A tonne of feathers, or a tonne of bricks?
ive asked the question to a crane driver.. she answered bricks..

always stood well clear of her lifts.....
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Old 09-09-2012, 11:00 AM   #32
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Originally Posted by Vincenzo
Answer = 42 Check with the Monty Python boys.

Not Monty Python. It was Douglas Adams, from Hitchhiker's Guide to the Galaxy.

For all your science questions and more ( and I guarantee you that everything discussed so far in this thread has been covered here) go to the ABC's Self Service Science Forum.

There are no science related answers you can't get there.

http://www.abcforums.com/forum.php?
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Old 09-09-2012, 11:01 AM   #33
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Default Re: Post your science questions here!

Why doesnt glue stick to the inside of the bottle?
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Old 09-09-2012, 11:14 AM   #34
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Default Re: Post your science questions here!

Leave the lid off and see what happens.
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Old 09-09-2012, 12:08 PM   #35
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Quote:
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This is a tricky one, but from what I've read, the velocity of particles 'spinning' in the milky way actually vary depending on distance from it's centre, with particles closer in spinning slightly quicker, but not by much. I think it would have to do with the physics involved when it was actually created, in space, where Newton's law of inertia is king.
My guess is that at its birth, whatever force that caused it to spin in the first place must have been so vast, it was able to accelerate everything in its way at roughly the same rate, and being space, there wasn't much to slow any of it down.
So really nobody knows haha
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Old 09-09-2012, 03:49 PM   #36
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Why doesn't the sun blow up?
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Old 09-09-2012, 05:04 PM   #37
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So really nobody knows haha
Probably not, but it's a good question.
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Old 09-09-2012, 05:05 PM   #38
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Default Re: Post your science questions here!

How many accelerators does a car have? Think about it carefully :p
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Old 09-09-2012, 05:49 PM   #39
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Default Re: Post your science questions here!

I might be completly off here but wouldn't you be able to call any number of things an 'accelerator'?

Petrol, throttle body, you? Petrol combusts to push rods which turns shafts that turn wheels that give motive force. Throttle governs acceleration but you could argue it's an accelerator as its fuction directly effects the motive force of the car.

It's been years since chem / physics so please correct my fuzzy logic
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Old 09-09-2012, 06:24 PM   #40
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Default Re: Post your science questions here!

The greatest minds on the planet are still arguing about space-time and no one has the faintest idea about why there is gravity although there are some pretty interesting and contradictory theories.

Every single "fact" above can and has be disproved many times.

Gravity is not linear and does not effect all things in the same way.

Time and space are not linear and light travelling from a stationary or moving object travelling through the same medium travels at the same perceived speed not only when viewed from each object but when viewed from the other object.

Why light appears to travel at different speeds through different media is also the source of several interesting and conflicting theories.

It is all very confusing stuff.
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Old 09-09-2012, 06:30 PM   #41
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Old 09-09-2012, 06:42 PM   #42
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Quote:
Originally Posted by seedywagon
How many accelerators does a car have? Think about it carefully :p
Interesting question... I think the answer will vary depending on how the car is operated over a specified period of time. Acceleration is defined as the rate at which an object's velocity changes over time, and expressed with a direction. A car coasting along in a straight line at a steady 100 km/hr has no force of acceleration, and therefore no accelerator, even if the foot pedal accelerator being depressed and the engine is operating. Could the steering wheel be considered an accelerator in some situations as well? Going around a bend in the road, maintaining 100 km/hr, the car is accelerating due to the change in direction (caused by the steering wheel), even though its speed doesn't change.
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Old 09-09-2012, 07:49 PM   #43
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Originally Posted by chamb0
Interesting question... I think the answer will vary depending on how the car is operated over a specified period of time. Acceleration is defined as the rate at which an object's velocity changes over time, and expressed with a direction. A car coasting along in a straight line at a steady 100 km/hr has no force of acceleration, and therefore no accelerator, even if the foot pedal accelerator being depressed and the engine is operating. Could the steering wheel be considered an accelerator in some situations as well? Going around a bend in the road, maintaining 100 km/hr, the car is accelerating due to the change in direction (caused by the steering wheel), even though its speed doesn't change.
You're close, the brake is also considered an accelerator too, as it also causes a change in velocity.
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Old 09-09-2012, 07:59 PM   #44
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Default Re: Post your science questions here!

funny how we lean to outer space type science related stuff or being a car forum, car stuff sciences....even clear metal for me......

however, I am fascinated by genetic memory, what does it mean?
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Old 09-09-2012, 08:29 PM   #45
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aye bro why do people go on about Evolution, yet their still apes on earth
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Old 09-09-2012, 08:34 PM   #46
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Default Re: Post your science questions here!

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aye bro why do people go on about Evolution, yet their still apes on earth
Because the species of ape that humans evolved from became humans?

Or, for a less serious reply, because the apes that haven't evolved yet still hang around train stations in Adidas shirts and Nike bum bags.
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Old 09-09-2012, 08:45 PM   #47
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Default Re: Post your science questions here!

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Originally Posted by BHDOGS
Why does the center of the galaxy and the edge spin at the same speed?
It doesn't...that's why it's a spiral instead of just a big spinning disc.

I love the "why are there still apes" evolution question...people assumed that "we evolved from monkeys". No we didn't. We evolved from a common ape-like hominid ancestor. Monkeys, gorillas, chimps, etc, all took one path, humans took another with plenty of dead-end offshoots that ended up with us.

Dogs, cats, all the apes and monkeys, and every animal we see isn't "incomplete" or "unevolved"...they are all the end result of an equally long evolutionary process as our species has been through, they are all equally advanced animals as we are, it's just they turned out like they did, and by a stroke of luck we turned out like we did. There's no rule that said we had to evolve intelligence of our level, it was an accident of evolution.


Quote:
Originally Posted by XARATE
Why doesnt glue stick to the inside of the bottle?
It does...the cap being on keeps the glue from setting and pretty much in a liquid state. Above the level of the glue is a fine layer of dried glue which can only really develop when a bottle sits for a while after being used.


Quote:
Originally Posted by ute83
Why doesn't the sun blow up?
Oh it will one day. At this stage of it's life, the pressure of the fusion reactions pushing outwards are just about equalled by the gravity of the mass of the star pulling inwards. When it consumes enough hydrogen and converts it into helium, it will start collapsing, working it's way down to iron burning, and that's pretty much it. Our star isn't big enough to "blow up" in a supernova, but it will collapse down and blow off shells of gas as it does after going through a stage of expansion as the reactions inside overcome the gravity of it's mass. It will expand as far as Earth or maybe more as a red giant, then collapse back down to a white dwarf.

Last edited by 2011G6E; 09-09-2012 at 08:53 PM.
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Old 09-09-2012, 08:59 PM   #48
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Quote:
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Yay! Acceleration due to gravity does not change depending on mass, it is and always will be 9.8 metres per second squared.
Hi. when I did science acceleration was 9.8 metres per second per second. What changed. Cheers MD
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Old 09-09-2012, 09:33 PM   #49
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Default Re: Post your science questions here!

Originally Posted by XR6T0Y
What's the meaning of life


Quote:
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I knew this wouldn't take long :p
Is the glass half full or half empty...

I always answer just to be ****, neither the glass is always full
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Old 09-09-2012, 09:54 PM   #50
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When will science know 100% what it is talking about ?
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Old 09-09-2012, 09:59 PM   #51
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"Why doesnt glue stick to the inside of the bottle?"

"It does...the cap being on keeps the glue from setting and pretty much in a liquid state. Above the level of the glue is a fine layer of dried glue which can only really develop when a bottle sits for a while after being used."

Being into woodwork, used from PVA, Epoxy, Resorcinol, Cyanoacrylate, Polyurethane, Urea-formaldehyde and hide glue... never had one stick to its supplied bottle or container!
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Old 09-09-2012, 10:03 PM   #52
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Why is the sky blue?
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Old 09-09-2012, 10:04 PM   #53
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Default Re: Post your science questions here!

Got one for you but the item in question is in the garage. Will take pics and see the opinion on what I found ;)
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Old 09-09-2012, 10:12 PM   #54
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Quote:
Originally Posted by XRDeeze
aye bro why do people go on about Evolution, yet their still apes on earth
Because Noahs ark saved all those apes like 100 years ago. Modern humans (homo habilus) have only been around for 50 years. So obviously like you presume, evolution is completely linear.

Homo habilus evolved directly from homo sapiens a hundred years ago. There are no other subspecies under the homo genus.
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Old 09-09-2012, 10:13 PM   #55
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Quote:
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Why is the sky blue?
Best explanation I've seen is here
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Old 09-09-2012, 10:35 PM   #56
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why do fish suffocate when you take them out of the water?
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Old 09-09-2012, 10:40 PM   #57
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why do fish suffocate when you take them out of the water?
When a fish is removed from water, their gills close up. When they are in water, the liquid moves around the gills and keeps them open, then as the fish opens it's mouth and draws in water, the water is forced out through the gills and oxygen remains.
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Old 09-09-2012, 10:54 PM   #58
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Quote:
Originally Posted by 2011G6E

Oh it will one day. At this stage of it's life, the pressure of the fusion reactions pushing outwards are just about equalled by the gravity of the mass of the star pulling inwards. When it consumes enough hydrogen and converts it into helium, it will start collapsing, working it's way down to iron burning, and that's pretty much it. Our star isn't big enough to "blow up" in a supernova, but it will collapse down and blow off shells of gas as it does after going through a stage of expansion as the reactions inside overcome the gravity of it's mass. It will expand as far as Earth or maybe more as a red giant, then collapse back down to a white dwarf.
I was taught this very different.
The way I knew it was.... The sun WILL blow up in a supernova. Not for many millions, if not billions of years. However, there will be no life left on Earth when it happens. Why? Because as the sun gets older, it expands. It will reach a point where it expands to much, and will wipe out Earth and life due to simple temperature (it will encapsulate [spelling?] everything effectively) before breaking its own bounds and exploding. Leaving no life in existance (for our Galaxy/Solar system anyways)
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Old 09-09-2012, 11:00 PM   #59
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Quote:
Originally Posted by XR6T0Y
I was taught this very different.
The way I knew it was.... The sun WILL blow up in a supernova. Not for many millions, if not billions of years. However, there will be no life left on Earth when it happens. Why? Because as the sun gets older, it expands. It will reach a point where it expands to much, and will wipe out Earth and life due to simple temperature (it will encapsulate [spelling?] everything effectively) before breaking its own bounds and exploding. Leaving no life in existance (for our Galaxy/Solar system anyways)
And moments before this happens, Super Massive Black Hole by Muse will echo throughout the universe.
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Old 09-09-2012, 11:04 PM   #60
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^ Lol
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