Quote:
Originally Posted by RobFrost
If you ignore the buoyancy of the ship and consider pure gravity, the ship will weigh less down there because some of the earth's gravity is in the water which is now above the ship, the gravity of the water thereby now acting upwards upon it.
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Quote:
Originally Posted by hbueno
The mass doesn't change, obviously, but the weight (force) would be less due to buoyancy.
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These ^
Some of the first gravity experiments were done against a mountain (to Frost's point) to measure the affect of mass.
And relative specific gravity of steel is 7.8 (to hbueno's point) meaning that the weight of the steel will be ~7/8ths of what it is on land.