Fish Quiz

[eaglesaquarium]

octopus

 

[Fishmanic]

https/www.youtube.com/watch?v=jLVhX_-BZh4
 
 
BATTER UP!

 

[eaglesaquarium]

FM... your videos scare me.  Not that they are scary in their own right, but the fact that such things exist (and that you can find them) frightens me a little.
 
 
 
Fishkeepers often use a 'siphon' to remove water from a tank during a water change, rather than just dunking buckets.  How does a siphon work?  (And for anyone who doesn't know, I am a science teacher in real life... so make sure your answer is good!)

 

[majerah1]

Atmospheric pressure. 

 

[Fishmanic]

more details needed I believe

 

[Ch4rlie]

FM... your videos scare me.  Not that they are scary in their own right, but the fact that such things exist (and that you can find them) frightens me a little.

 
Fm finds these sites with neigh problem at all .....

 

[eaglesaquarium]

Atmospheric pressure. 

 
 

more details needed I believe

 
 
That is true. 

 

[majerah1]

Yeah but I don't remember exactly how to explain it, so Ill let someone else take that honor

 

[HAMBONE]

Yeah but I don't remember exactly how to explain it, so Ill let someone else take that honor

It's the Brenulli Effect.. Where gravity in conjunction with hydrolic pressures interact and gets the fluid in motion.. The fluid will continue to stay in motion until the fluid pressure is equal, or something like that..

 

[eaglesaquarium]

 

Yeah but I don't remember exactly how to explain it, so Ill let someone else take that honor

It's the Brenulli Effect.. Where gravity in conjunction with hydrolic pressures interact and gets the fluid in motion.. The fluid will continue to stay in motion until the fluid pressure is equal, or something like that..
 

 
 
Close enough.  Its not Bernoullis Principle.  But, rather about pressure difference.
 
 
Once the tube is full of fluid, the fluid will then move from an area of high pressure to the area of low pressure.  It will continue to flow until the end of the tube is higher than the level of the fluid.
 

How A Siphon Works
Siphons operate by atmospheric pressure. The container from which the liquid is siphoned must therefore be open to the air. When the tube is filled, the liquid will run out of the lower end. (The greater weight of the liquid in the arm outside the container determines the direction of flow of the liquid.) As the liquid starts to flow, the fluid pressure at the top of the tube is lowered. A liquid always flows from an area under higher pressure to an area of lower pressure. The liquid in the container (under atmospheric pressure) flows up into the tube (an area of lowered pressure). This liquid in turn will flow out the outside end of the tube, again lowering the pressure at the top of the tube.
Once the flow has begun, it will continue if undisturbed as long as the inside end of the tube remains below the surface of the liquid. The flow can be cut off by raising the outside end of the tube above the level of the surface of the liquid in the container.
One limit to the use of siphons is imposed by the height to which atmospheric pressure can lift a given liquid. At sea level, atmospheric pressure can raise water to a height of about 30 feet (9 m). At higher altitudes the pressure is less, as is the height to which the water can be raised. Liquids heavier than water cannot be raised as high as water. Thus at sea level, mercury can only be raised about 30 inches (760 mm).

http/science.howstuffworks.com/siphon-info.htm

 

[eaglesaquarium]

14 hours is sufficient time....

Next question.

 

[Fishmanic]

There are four parts to this question about goldfish:
 
1) what color are goldfish?  
 
2) What fish were they originally bred from.    
 
3) What is the largest true  goldfiish ever captured?   
 
4)  name this type of goldfish?
 
 
 
 

 
Let's put the time limit on asking or answering a question to 12 hours---that should be sufficient----all in favor say Aye

 

[eaglesaquarium]

It depends...

 

[WILDER]

1) what color are goldfish?  
 
2) What fish were they originally bred from.    
 
3) What is the largest true  goldfiish ever captured?   
 
4)  name this type of goldfish?
 
Common goldfish are usually orange.
question 2 & 3 haven't a clue.
The pic is it called a bubble eyed goldfish. Worst goldfish ever for looks.. LOL.

 

[Baccus]

1. Common kept goldfish are orange, but the "wild" type and how most goldfish start out are a copper or brown colour. Usually these copper ones will turn orange as they mature.

2. Carp. Carassius auratus

3. 20kg

4. Celestial Goldfish