Archimedes principle Definition and 106 Threads

hey can any1 help me with these 3 questions? 1. a piece of lead has a shape of a hockey puck with a diameter of 7.5cm and a height of 2.5cm. If the puck is placed in a mercury bath it floats. how deep below the surface of the mercury is the bottom of the lead puck? [2.1cm] (can anyone give...

A styrofoam slab has a thickness of 12.6 cm and a density of 470 kg/m 3 . What is the area of the slab if it floats just awash (top of slab is even with the water surface) in fresh water when a 65.7 kg swimmer is aboard? Answer in units of m 2 . im trying to use pressure=density of...

I have run into a problem and am completely stumped after. Help me before i pull my hair out. What is the smallest number of whole logs (p (density) 725 kgm^-3) r= .0800m l=3.00m that can be used to build a raft that will carry four people each with a mass of 80.0 kg. so using (pi*r^2*l)*725...

How would I best explain Archimedes Principle to kids 9-10? So they can understand it? I don't need any experiments, All I want is an easy explination on what it is and how it works so 10 year old kids can understand. And in the shortest amount of words...

Ok, I've seen many proofs of this, all being the same, but the closest I could find online was here: http://freespace.virgin.net/mark.davidson3/IMS2121/buoyancy/Buoyancy.html Basically the idea is you mess around with the formulas for pressure and hey bingo. However, I have one question - the...

A wooden block 20 * 20 *10 cm^3 has a density of .6 g/ cm^3 (a) How much iron (density = 7.86 g/cm^3) can be placed on to p of the block if the top of the block is to be level with the water around it? (b) If iron were attached to the bottom of the block instead, what mass of iron would it...