need a laugh

[solarman216]

here I am bored to tears with a pulled back and getting pissed.

So Question 1
Can a solid burn?

Question 2
if water did as most other stuff does and got denser when frozen (ie heavier) instead of lighter, would we humans be able to survive on earth,

answers on a post card please,

OK on here will be good,

Rick

[rustic]

To help you out..
What solids burn?
Wood, Coal, Paper, ....

Ice gets less dense as it gets colder, that's why it floats on water.

Water has it's maximum density at 4C that's why fish can survive when the water above them has turned to ice.

Rustic

[solarman216]

sorry but those items in there natural state do not burn, and yes ice floats so what if it did not? Rick

[Lazy-Ferret]

Originally Posted by solarman216

.... and yes ice floats so what if it did not? Rick

Well all those Souls on the Titanic would not be dead

I would presume that if all the Ice sank, the water levels would rise, drowning most of us.

As far as burning a Solid, the thing that comes to mind is Wire wool, it's made from Steel, which is a solid, just thin strands, but it burns very easily.

[don simon]

1) Doesn't the said solid need oxygen to burn? And as there is no oxygen within a solid then no. Or the solid heats up to a gaseous state and appears to burn.
2) Ain't got a chuffing clue.

[rustic]

Did you know, water is special, without it's properties, I doubt life would exist.
It is, as far as I am aware, unique.

It can exist as a solid, a liquid and a vapour at the same time...
At a certain temperature and pressure.
It's called the triple point of water.
The temperature on the graph is show in degrees Kelvin, to convert to Celsius,
approx 273 K = 0 C

A good friday night discussion.

[solarman216]

OK Clive you have the second one, yes if all the ice sank there would be very little land mass to support life, if at all.

Don Simon yes only a gas can actually burn, so everything can burn but has to attain a temperature to turn it into a gas first, Rick

[solarman216]

Rustic that is just too complicated on a Friday night, and with the likes of Clive and Don my little forray did not last too long did it, will have to think of some more.

How about a prop shaft, is it constant velocity? Rick

[don simon]

Have you done the possibility of an airplane taking off from a conveyor belt yet?

[solarman216]

Originally Posted by don simon

Have you done the possibility of an airplane taking off from a conveyor belt yet?

not heard that one, but as the plane makes its own thrust by moving air it would matter little what it is standing on providing it can manage enough thrust to get airborne, Rick

[don simon]

Doesn't the plane need to be moving forward to provide lift? The conveyor belt will render the plane stationary, won't it?

[briggie]

Originally Posted by don simon

Doesn't the plane need to be moving forward to provide lift? The conveyor belt will render the plane stationary, won't it?

as long as the air underneath the plane is moving , it will provide lift

[solarman216]

[QUOTE=don simon;296271]Doesn't the plane need to be moving forward to provide lift? The conveyor belt will render the plane stationary, won't it?[/QUOTE

No because the thrust developed by the plane is independent of the conveyor belt, it may take a bit longer to get airborne, but it will get there, Rick

[rustic]

Originally Posted by don simon

Doesn't the plane need to be moving forward to provide lift? The conveyor belt will render the plane stationary, won't it?

Wind is required to travel over the wing to give lift.
If the aeroplane is stationary, and you tether it, so it can only move up or down, and have a huge fan, pushing air at well over 125 mph...... the aeroplane would go up vertically.



Now if you were in a car travelling at the speed of light, on a road and shined a headlight onto the road, would you see the cat's eyes...?


Alex... this is not a challenge, it is a hypothetical question...

[don simon]

[QUOTE=solarman216;296275]

Originally Posted by don simon

Doesn't the plane need to be moving forward to provide lift? The conveyor belt will render the plane stationary, won't it?[/QUOTE

No because the thrust developed by the plane is independent of the conveyor belt, it may take a bit longer to get airborne, but it will get there, Rick

But that still needs air flow over the wings, so the answer is that it can't as the plane would have to be moving faster than the speed of the conveyor. I'm thinking that if you blow along a table top on which a piece of paper is sitting, the paper will be lifted off the table top. it will basically hover as it doesn't have thruster to make it move