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- Manlobbi
Outskirts of Shrewd'm / Science, Technology, Engineering and Mathematics
No. of Recommendations: 1
When you drop an object in water, it displaces the amount of water equal to its mass if it floats, but equal to its volume if it sinks. Why this difference? Why does water care if the object is going to sink or float?
No. of Recommendations: 2
Specific gravity.
No. of Recommendations: 1
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As is readily apparent, any fifth grader with a PhD could have simply looked it up and gotten an answer.
The intuitive answer that comes to me is that when the mass to volume ratio of the object is less than that of water it floats, thus reducing the volume of water displaced. When that ratio is greater than that of water, it sinks, displacing its entire volume.
No. of Recommendations: 3
Or relative density.
Tomatoes, TomAHTOS
No. of Recommendations: 1
Or specific density.
There are tables for the marine salvage industry that list the weight of the common materials in objects that required flotation in salt water. We used it to calculate the approximate amount of lift necessary to refloat watercraft from small skiffs to large yachts.
The lift necessary to float a 40'boat varies greatly with the materials that boat contains. The hull might be very heavy, ultralight or nearly buoyant; cement, steel, aluminum, fiberglass, carbon fiber, wood. Maybe there's a steel keel or lead ballast, multiple drive trains?
It's essential to have these factors figured out before getting underway on a salvage job.
No. of Recommendations: 1
specific density ... salvage job
Interesting.
No. of Recommendations: 0
Thank you all. I got my answer.
