how do you find the mass and volume of a dog and a diamond ring?

Question

it's part of my science homework, we need to print out pics of object that float or sink and we have to find the density of that object. my teacher wasnt specific enough , so how the hell am i going to find the mass and volume of a pup and diamond ring. (those were the objects i printed out)

Answer 1

There are many ways to do this problem. The best way to probably handle density, and perhaps mass even, is using Archimedes principle of buoyancy. You can find a detailed discussion on www.wikipedia.com and search for Archimedes or buoyancy. The main idea is that "the weight of the displaced fluid is directly proportional to the volume of the displaced fluid".

good luck!

Answer 2

Get a measuring cup and fill it right up to the very edge, probably where the spout is, so water is ready to overflow. Get a graduated cylinder that can measure small amounts of water precisely, and place it under the spout. Put the ring in the water; the measuring cup will overflow by the exact volume of the ring. To find out its mass, put it on a delicate balance scale.

To do the same with the dog, you'll need a bigger tub and some poison. Snuff the dog and drop it in the water. I'm afraid there is no other way to accurately measure the dog's volume, because if he's alive he'll thrash about and induce experimental error. Make sure PETA does not hear about this experiment.

Answer 3

fill a tub with water and put your object...dog...into it...all the way...and measure the amount of water displaced. the tub should be rectangular by the way to make measuring easier.