Alpo Posted July 1 Share Posted July 1 I am attempting to find the volume of a bowl. Logically you should be able to consider the bowl as a sphere, and when you have the volume of the sphere cut it in half. The bowl in question is 12 cm in diameter and 6 cm high. That sort of makes it look like it's exactly half of a sphere. https://www.wikihow.com/Calculate-the-Volume-of-a-Sphere Using the formula on that site V=4/3π (R³) 4/3 pi is a constant. 4.188790... The only thing I need to find is the cube of the radius. D-12cm, H-6cm these are the dimensions given for the bowl R=6 R³ = 216 4/3π=4.19 V=904.8cc 1/2V = 452.5 cc Did I skip a step somewhere? Because the site that is selling the bowl says the capacity of the bowl is 200 mL. While I dislike, intensely, the metric system, I do remember that a milliliter and a cubic centimeter are the same damn thing. So if I come up with 452 CCs and they come up with 200 mL, something's wrong somewhere. Quote Link to comment Share on other sites More sharing options...
Texas Joker Posted July 1 Share Posted July 1 How thick is the base? 1 Quote Link to comment Share on other sites More sharing options...
Cypress Sun Posted July 1 Share Posted July 1 3 Quote Link to comment Share on other sites More sharing options...
Subdeacon Joe Posted July 1 Share Posted July 1 You are showing the outside dimensions. What is the ID and what is the actual depth? And what is the actual shape of the interior? 1 Quote Link to comment Share on other sites More sharing options...
Alpo Posted July 1 Author Share Posted July 1 8 minutes ago, Texas Joker said: How thick is the base? It does not say how thick the base is, but it would have to be awful damn thick to cut 450 down to 200. Quote Link to comment Share on other sites More sharing options...
Marshal Mo Hare, SASS #45984 Posted July 1 Share Posted July 1 They don’t consider capacity to mean filled to the brim and they won’t give you a number with more than two significant digits, in this case they only gave you one. now I suggest that you put 200 ml of water in it and then add 100 ml and consider which you would like to be a bowlful, 200 or 300. If you want to live dangerously add another 100. In any case, 452 or not, nobody would advise you that 452 was the capacity of that bowl. did you measure inside or outside? It looks like outside which would be significantly off anyway. Quote Link to comment Share on other sites More sharing options...
Eyesa Horg Posted July 1 Share Posted July 1 It's not really a sphere! More half of an oval shape as there's more curve as you get to the bottom. Quote Link to comment Share on other sites More sharing options...
Subdeacon Joe Posted July 1 Share Posted July 1 Figure that inner radius is 5cm. That gives a volume of about 523 for a sphere, or about 261 for the half of it. Quote Link to comment Share on other sites More sharing options...
John Kloehr Posted July 1 Share Posted July 1 Your math is right except for some significant figures considerations (the presented measurements on the graphic already violate the rules). If I assume a spherical bowl (well, semi-spherical), and use 5 cm instead of 6 (for inner volume), I get 262 cubic cm. And I would not fill it full before trying to take my bowl to the table. The shape is more ovoid, the base is taller than the side thickness. So actually seems like 200 ml is a legitimate representation of that bowl's useful capacity.. Consider aquariums are sold by the volume of the box the aquarium comes in, assuming aquariums came in boxes. So a 50 gallon aquarium does not hold 50 gallons, it displaces 50 gallons. Quote Link to comment Share on other sites More sharing options...
Marshal Mo Hare, SASS #45984 Posted July 1 Share Posted July 1 Nothing says what’s its volume better than filling it with water and measuring. I bet the bottom takes up a lot of what would be its volume. 1 Quote Link to comment Share on other sites More sharing options...
Texas Lizard Posted July 1 Share Posted July 1 32 minutes ago, Marshal Mo Hare, SASS #45984 said: Nothing says what’s its volume better than filling it with water and measuring. I bet the bottom takes up a lot of what would be its volume. Yep...Fill it with water, than pour into measuring cup...Read the amount....Make life easy....After that, who cares.... Texas Lizard Quote Link to comment Share on other sites More sharing options...
Marshal Mo Hare, SASS #45984 Posted July 1 Share Posted July 1 If you freeze water in it I think you would find the hemispherical block of ice to be squished in the polar region, somewhat like earth which is a bit pumpkin shaped. don’t want to risk cracking the bowl? Make jello. Quote Link to comment Share on other sites More sharing options...
Father Kit Cool Gun Garth Posted July 1 Share Posted July 1 Using a clear bowl as an example so you cab see the shape of the inside...a possibility? Quote Link to comment Share on other sites More sharing options...
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