Why is water heavier than it looks?

I think this question belongs in the psychology section.

 

Better Best, Welcome to Physics Forums!

How heavy, exactly, does water look?

Cheers,
Bobbywhy

 

Always slipping through your fingers?

 

no, it's not easy to move around. Its inertial mass and gravitational mass are the same.

 

Weight of 1 US Gallon of water = approx. 8.35 lb (about 3.79 kg)
Weight of 1 Imperial gallon (i.e. UK measure) of water weighs 10 pounds by definition, at a specified temperature and pressure. (4.536 kg)
http://wiki.answers.com/Q/How_much_does_one_gallon_of_water_weigh


also see "Water Facts":
http://www.waterfilterdude.com/water-facts.shtml

 

This may come as a surprise to you but your eyes are not scales. They detect light, not mass.

 

I'm going to assume no troll, and say the answer is density. You can imagine the water balloon has got more stuff inside, even though it has same volume as the air balloon. The ratio of 'stuff' to volume is density. (Or, more technically than 'stuff', I should say mass). In an equation:
[tex]density = \frac{mass}{volume}[/tex]
And the density of different materials is different.

 

I did wonder about this question, at first,Borek. But -
Is this question to do with the fact that, when you try to move 'through' water, you don't need to 'move it all', just to push some of it out of the way, yet, when you try to lift it (in a bucket) you need to move it all? This contrasts with a solid brick. When you lift or move a brick, you have to move all of it. Our senses are used to dealing with Newton's second law for solids and we are familiar with the extra vertical forces due to the weight of all solid objects, when lifting them. On the Moon, things are a bit different and probably a bit confusing for a while.