Calculate Weight of 3m^3 Ichthyosaurus in Metric Tonnes

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To calculate the weight of a 3m³ ichthyosaurus, one can use the principle of buoyancy, which states that a floating object displaces its own weight in water. Assuming fresh water with a density of 1000 kg/m³, the weight of 3m³ of water is 3075 kg when using seawater density of 1025 kg/m³. Converting this mass to metric tonnes results in 3.075 metric tonnes. The discussion highlights that the question may not require extensive thought, as it simplifies to basic density and volume calculations. Additionally, there is a suggestion to explore the density of seawater during the early Jurassic for further insight.
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Homework Statement



Fossilized ichthyosaurus remains enable us to estimate their volume. If we assume that a
3m^3 icthyosaurus was "wightless" when it swam under water. What was its weight in metric tonnes?





plugging this into the equation would give me B .. not weight??

Homework Equations



B=Wdisp. lqd ??

The Attempt at a Solution



B=V x density x g
g=9.81
density= 1000 kg/m^3 (assuming fresh water)
V=3m^3
 
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A floating object displaces it's own weight in water - how much does 3m^3 of water weigh

ps. actually the question is asking for the mass of 3m^3 of water

pps. I would imagine they lived in the sea
 
Soo. 1m^3=1025 kg
3m^3=1025 x 3=3075kg
1kg=0.001metric tonns
3075 x 0.001
=3.075 metric tonnes

its really that simple? haha
 
When a question asks for 'weight' in tons you can be sure that not a great deal of thought went into it

For bonus marks you could fin the density of seawater in the early Jurassic
 
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