by Ron Kurtus
|Floating||Salt water and floating||USA|
|Pressure||Squeezing a sealed plastic bottle||USA|
|Floating||Why are lighter molecule in high altitute?||USA|
|Pressure||Velocity of water in a pipe||Canada|
|Fluids||Force in square container||TANZANIA|
|Floating||What solids will float on liquid mercury?||Canada|
|Floating||Egg covered in foil floats||USA|
|Floating||Expansion of balloons||USA|
|Floating||Needs to make a submarine||USA|
|Fluids||Volume of an egg||USA|
Salt water and floating
April 18, 2005
Does the amount of salt in sea water effect how objects float in it?
P.S. I need this by 4-19-05
thank you Pattilynne Webb
Pattilynne - USA
Salt make the water denser, such that objects will float easier in the salt water. The Great Salt Lake has almost the most salt anywhere. A person can float real well in that water.
Squeezing a sealed plastic bottle
April 15, 2005
Squeezing the sides of a sealed plastic bottle filled with a liquid
a.decreases the volume of the fluid
b.increases the pressure of the fluid
c.increases the volume of the fluid
d.decreases the pressure of the fluid?????
debbie - USA
The volume of the fluid will not change much, but the pressure increases. If there is any air in the bottle, that will decrease in volume due to the squeezing.
Why are lighter molecule in high altitute?
April 7, 2005
What are the physical bases of the earth's climate and weather?
Explain why the compostion of the earth's atmosphere at an altitude of 759lm is He, H, and O, instead of the heavier molecules such as O2 and N2.
gale - USA
Lighter molecule move up, while heavy ones are pulled down similar why lighter object float up to the top in water, while heavy objects sink.
Velocity of water in a pipe
April 4, 2005
I have a physics problem which seems impossible; A horizontal pipe 10cm in dia.
has a smooth reduction to 5 cm in dia. if the pressure in the large pipe is 8x10(4) and the pressure in the smaller pipe is 6x10(4), at what rate does the water flow through both sections?
I am quite confused b/there is no velocity given to be able to calculate flow rate,but pressure is given, but I do not know what to do with it.
Thanks for your help.
joanna - Canada
If you had can of water 10 cm deep and at 5 cm, you stuck a pinhole, the water would squirt out due to the pressure of the 5cm of water above the hole. So there you have the pressure and instead of a pinhole, it is a 5cm hole.
I hope that is enough to solve the problem.
Force in square container
March 17, 2005
DEAR SIR /MADAM,
I AM A STUDENT IN ADVANCED SECONDARY SCHOOL IN TANZANIA.
I HAVE A PROBLEM IN ANALYSIS OF FORCES DUE TO FLUID ACTING IN A SQUARE AND ROUND CONTAINER.
WOULD YOU HELP ME PLEASE?
JONATHAN - TANZANIA
The force in a fluid should not be dependent on the shape of the container. Teh force should be equal in all directions.
What solids will float on liquid mercury?
March 6, 2005
Hi I need to know this: "What solids will float on liquid mercury?"
- Please email me on March.7, 2005, Thanks so much!
Ainslea - Canada
Mercury is heavy and dense. Look at the Periodic Table at:
You will see metals that are lighter that mercury (Hg) such as iron and gold that should float on the substance.
Egg covered in foil floats
February 26, 2005
Why will an egg covered in foil or cling wrap float in water, when a normal egg sinks?
I had never heard of that, so I had to try it myself. Amazing! I know there are experiments where you can make an egg float by adding salt to the water to change the density, but this is different.
The only thing I can thing of is that the egg shell is very porous and quickly absorbs water. When the egg is wrapped in foil, the shell can't add the extra weight of the water, so it won't sink.
Note that old or spoiled eggs will float, but fresh ones will sink.
Expansion of balloons
January 30, 2005
If you fill ballons at 22 degrees C, with equal volumes of oxygen, helium,
argon and air to make the ballons the same size then heat the ballons, will they all expand the same amount? If not, why?
The pressure inside each balloon would be the same, because they are the same size, but the density of each gas would be different, due to their different weights.
According to Charles' Law, the expansion would be at the same rate, assuming they were ideal or perfect gases. Actually, there is a difference.
Needs to make a submarine
January 17, 2005
i have a science project and it is to make a submarine out of what ever but it must sink, float, and then sink again with out me touching it, or vis vera. Is there such a way to do this???????
please i need help now !!!!!!!! i must turn this in by wed. 1/19/05
lori - USA
See this page for an easy experiment that will be like a submarine:
Volume of an egg
January 15, 2005
Can you please assist me in measuring water volumes. I need to contruct an egg shaped container that will hold a wter volume of 40 gals. Can you please assist me with diminions?
Thank you in advance for your reply.
Founder and President of North American Inshore Sportsmen
Don - USA
It is extremely difficult to calculate the dimensions of an egg shape. Eggs have all sorts of different proportions.
If it was a sphere that held 40 gallons of water, it would be 26 inches in diameter.
Hopefully, this reader feedback has helped provide information about Fluids.
Resources and references
Questions and comments
Do you have any questions, comments, or opinions on this subject? If so, send an email with your feedback. I will try to get back to you as soon as possible.
Please include it as a link on your website or as a reference in your report, document, or thesis.
Where are you now?
Feedback on Fluids