does the weight of a fish increce tank weight?

[fwprawn]

Somebody should PROVE this RIGHT NOW - Take any container of water - and add something to it, and see what happens.
I do not have a digital scale at my condo - otherwise I would.

 

[blindkiller85]

Blind - wow - how literal are you ?

It was a JOKE.

I'm literally that literal.

That and without you putting something to imply that it was a joke i.e. LOL heh, hah, hahaha, lmao etc there's no indication of any emotion, therefor your statement is literal and only held for face value. There's no speech on a forum post for sarcasm or a joke. It's your job to make that obvious so that we're not literally all that literal. Lmao I love semantics.

Somebody should PROVE this RIGHT NOW - Take any container of water - and add something to it, and see what happens.
I do not have a digital scale at my condo - otherwise I would.

Go to walmart or a supermarket and find a scale that's there for public use then.

 

[petspoiler]

this thread is making me lmao.
Keep it up guys!

 

[Pomatomus]

It's actually very simple....and it depends on the fish.

If the fish is buoyant, its density is less than the water. This means that its body weighs less than the same volume of water.

If the fish is negatively buoyant (i.e. sinks), it's more dense than water for the given volume. It has more mass than the given volume of water.

So a fish with a bloated swim bladder weighs less than the water it displaces; and something lacking a swim bladder (or with a vestigial one) weighs more. A pleco would be an example of something heavier than water.

Salt water weighs more than freshwater (it's more dense), so if you throw a freshwater fish in a saltwater tank it will often float.

Another example: Most people with average BMI will float in fresh water when they hold their breath (an increase in volume that marginally increases weight), but will sink when they exhale (less volume)

And people are forgetting that density = mass / volume

So when these people are saying that density is independent of weight, they are horribly misguided.

 

[xraycer]

Here's definitive prove on a much smaller scale

 

[fwprawn]

FANTASTIC - well done - That one with the bobber really hits the nail on the head. I didn't half expect that.

 

[Pomatomus]

An excellent example right there. Needless to say the cup with the bobber has a greater volume than that with the penny. Its contents are, on average, less dense than the one with the penny. And if volume was held as a constant, more water, and thus more weight, would be found in the cup with the penny.
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