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 Subject: Density checking Category: Science > Physics Asked by: gezwez-ga List Price: \$2.00 Posted: 11 Aug 2002 19:27 PDT Expires: 10 Sep 2002 19:27 PDT Question ID: 53430
 `what will I need to check the density of an object and what are the procedures` Request for Question Clarification by secret901-ga on 11 Aug 2002 20:12 PDT ```Does this object have uniform density? That is, does it have the same density throughout?```
 ```Density is the measurement of how much stuff has been packed in a certain amount of space. Thus, in order to determine the density of an object, you would need to first find its mass and its volume. If you are performing a physics experiment, it is best to use SI units (m, kg, L) Materials: -Weight-measuring device (balance, scale, etc.) -You also need a device to measure the volume of the object. If the shape of the object is regular (cube, sphere, rectangular prism, etc.) then it is easy to measure the volume. If it is not regular, you can fill a water container to its brim, then place the object in the water (make sure the object is completely submerged). Some water will spill out. The amount of water that has spilt is the volume. Once you determined the volume of the object, you can determine its density by taking the mass and divide it by the volume. For example: You have a rock, and you want to find its density. You weigh it, and it weighs 0.5 kg. Placing it in a 1.0 L water container full of water and taking it out leaves 0.7 L. The volume of the rock is thus (1.0 L - 0.7 L = 0.3 L). Now, to find its density in kg/L, you divide the mass by the volume: 0.5 kg/0.3 L = 1.7 kg/L. Now, perhaps 1.7 kg/L is not helpful to you and you decide to change it into kg/cubic meters. The conversion would be like this: 1.7 kg/L * 0.001 L/cubic meter = 1.7 x 10^(-3) kg/cubic meter. Note that water's density is 1 gm/cc or 1 kg/L, so you can estimate an object's density by looking at whether it floats or sink in water (if it floats, its density is smaller; if it sinks, its density is larger). Thank you for using Google Answers, if you need clarification, please request for it before rating this answer. secret901-ga``` Clarification of Answer by secret901-ga on 11 Aug 2002 21:00 PDT ```Search strategy: measuring density``` Clarification of Answer by secret901-ga on 11 Aug 2002 21:03 PDT ```Oops, my sincere apologies! The last conversion is wrong: 1.7 kg/L * 0.001 L/cubic meter = 1.7 x 10^(-3) kg/cubic meter. should be: 1.7 kg/L * 1000 L/cubic meter = 1.7 x 10^3 kg/cubic meter. please make a note of that. 1 cubic meter = 1000 L.```