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Does a tank of water weigh the same with a fish added to it2007-11-24 23:11:25

if a tank of water weighing 10lbs. has a 5lb. fish added does it now weigh 15lbs. or does it remain the same?

Answers:

Nono, the fish actually subtracts 5 pounds, so your tank weighs about 5 pounds now!

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Total weight will include the weight of the fish after it's added. So it's 15lbs in the above example.

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the fish's wieght should be added.

total is 15lbs.

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Yep, it's 15 lbs. The weight of the fish doesn't just disappear. But, I'm not sure if, in reality, a 5 lb. fish would fit in 10 lbs. of water. :)

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It will weigh 15 lbs. Even though the fish is suspended it is pushing down.

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if you stand on a scale and you wiegh 100 lbs and then pick up a wieght that ways 10lbs how much will the scale read?

Oh right i forgot about the antigravity thing. isnt nasa using that now. haha

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As Scott said, fish have an anit-gravity field, so it would be like subtracting 5 pounds... and then any water within the field.

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yes it would be the same plus the fish you added so 15 lbs, its kind of common sense don't you think?

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No see, when you add things to water it weighs nothing. Its just like if you went swimming in the ocean. Your in water so you'd weigh zero pounds.

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remains the same