PDF chapter test TRY NOW
Calculate the number of dust particles present in the air at a particular place using a graph sheet.
Materials required:
Four or five graph sheets, grease, a marker pen and a magnifying glass.
Procedure:
- Draw a square of \(\text{5} \times \text{5}\ cm\) in a graph sheet using a marker pen.
- Apply a thin film of grease is to the graph sheet.
- Make four or five graph sheets in the same manner.
- Place each dust collector in different places.
- After the scheduled time, remove the paper.
- Count the number of collected dust particles in the marked area on the sheet, using a magnifying glass.
- Calculate the mean value and range from the collected details using the respective formulas.
- Tabulate it in the given table format.
| Location of dust collector | Mean number of dust particles per small square | Range |
- Which area do you think will have the most dust?
- Which area do you think will have the least dust?
Important!
This is an experiment exercise. Write your answer in a white sheet and compare it with the reference solution.
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