buoyancy

  1. R

    Calculating Buoyancy

    Hi Does anyone know how to calculate how much volume of air is required to make an object buoyant? I'm about to construct a floating golf green and would like to know how much volume of air will be required to make it float. Is there a simple equation that could give me this volume? I'd like...
  2. B

    Buoyancy Problem

    Hi I was just wondering if someone could help me with a buoyancy question. I'm trying to calculate the volume of water displaced by my river rapids boat depending on the depth it is submerged. The rubber section, which will be partly submerged, is bascially a dognut (torus) with the inside...
  3. A

    Buoyancy Force Question

    Hi, I am looking to investigate the buoyancy force of a cuboid. The dimensions of the cuboid are 30cm x 20cm x 15 cm. When the cuboid is placed in the water (the face 30cm x 20cm faces the water), 4cm of the cuboid will be submerged. If I push the cuboid so that the top face is 15mm below the...
  4. A

    Buoyancy Pressure

    Hi, I am looking to work out the buoyancy pressure of an object of mass 2kg when held in a tank of tap water at a depth of 300mm (final answer in mmHg). Using Archimedes, I have that the buoyancy force is equal to: P*A*y*g Where p is the density of the water (I worked this out to be...
  5. haflore

    [SOLVED] Physics questions, air buoyancy and volume

    For this set of questions I don't need answers, per se, what I need is a little help figuring out where to begin to work them out. 1st question is: The density of air near the earth's surface is 1.29Kg/m^3. If a helium balloon with a mass of 1Kg floats in the air without rising or falling...
  6. S

    Calculating volume using buoyancy

    That's the question. Here's the information I have: Vsphere= pi/6(d^3) W = mg Wc + Wo' = 0.650 N Wc' + Wo' = 0.550 N I'm unsure of how to do this because it asks to find the volume ONLY BY USING THE two weight measurements. The simpler way to do it would be to measure how much fluid is...