Prelab Report 1 Completed.docx

2 volume remove a larger graduated cylinder and a

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2. Volume : Remove a larger graduated cylinder, and a large test tube (six inches) from the equipment locker and fill the text tube to the top with deionized water. Then pour the water into the graduated cylinder and read the volume of the graduated cylinder at eye level from the bottom of the meniscus. Make sure to know what value each hash mark represents. 3. Mass : Make sure the scale is zeroed out and record the mass of the wooden block on the electronic balance and be sure to use the weighing paper. Record the mass to three decimal points. 4. Density of the Wood Block : The formula for density is mass/volume. Volume is length x width x height. And the mass was determined on the electronic scale. These values have been previously recorded on the lab sheet (steps 1 and 3). 5. Percent Error : Percent error is a measure of the accuracy of the experimental value. In step 1 the wood block was measured in both English and metric units, and by dividing the metric units to the corresponding English units you can get the conversion factor for all the units. Average the conversion factor is compared to the accepted value using the percent error formula to calculate the accuracy of the measurements. Record the data in the lab sheet. 6. Density of Unknown : Using the unknown metal sample you gathered from the supply cart, record the mass of the unknown metal on the lab sheet using the electronic balance. Put 25ml of deionized water in the graduated cylinder and place the unknown metal in the graduated cylinder. DO NOT drop it in vertically, instead, tilt the cylinder sideways enough so the water does not spill out and slide the unknown metal in gently. Now tilt the cylinder upright and record the volume on your lab sheet. The difference should be the volume of the metal sample, and with that you are able to calculate the density.
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  • Spring '16
  • RexJ.Gamble
  • International System of Units, Conversion of units

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