Density

Topics: Volume, Density, Prism Pages: 3 (823 words) Published: August 31, 2013
Lab Report
Question- Why do few objects float in water where as others sink? Hypothesis- I think the objects that have a greater density than water will sink. So whichever object has a density more than 1g/cm³ will sink in water. This is known as relative density where the density of the substance is compared to the density of water. Hence, the object that has a greater mass: volume ratio than water will sink. Materials-

* 1 measuring cylinder
* 1 rectangular prism
* 1 ball of plasticine
* 1 cylinder
* 1 cube
* 1 micrometer
* 1 vernier calliper
* 1 balance
Variables-
Independent- The object that was used
Dependent- The density of the object
Controlled- The water in the measuring cylinder
Procedure-
1. Get the 4 objects (rectangular prism, ball of plasticine, cylinder, and cube) that you’re going to experiment with. 2. Measure the mass of the rectangular prism by weighing it on the balance. Weigh it three times to get an accurate measurement. Then find the measurements of the length, width, and height using a vernier calliper. Use the formula l× b× h to find the volume. Divide the mass by the volume to get the density. 3. Measure the mass of the plasticine by weighing it on the balance. Weigh it three times to get an accurate measurement. Now fill up the measuring cylinder to a certain level and note it down. Next, drop the plascticine ball into the measuring cylinder and see how much the water level has increased. Subtract the increase in the water level and the initial water level to get the volume. Divide the mass by the volume to get the density 4. Measure the mass of the cylinder by weighing it on the balance. Weigh it three times to get an accurate measurement. Then find the diameter of the cylinder by using a micrometer and use the vernier calliper to find the height. Use the formula πr2h to find the volume. Divide the mass by the volume to get the density 5. Measure the mass of the cube by weighing...
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