Jumat, 19 Juni 2009
WSS
Student Work Sheet
QUANTITY AND UNITS
Standard competition : 1. apply the concept physical quantity and it’s measure .
Based competition : 1.1 measure the physical quantity (length, mass, and time)
Objectives of study : student can use instrument measure of length ,
mass , and time with several kind of instrument
measure .
activity :
- mention the names of instrument measure you know !
- classify that instruments measure to this table appropriate with the quantity .
| Names of instrument measure | |||
| No | Quantity of length | Quantity of mass | Quantity of time |
| 1. 2. 3. 4. 5. 6. 7. | | | |
- mention the smallest scale of instrument measure
| No | Quantity | Name of instrument | Smallest scale |
| 1 | Length | 1 2 3 4 | |
| 2 | Mass | 1 2 3 | |
| 3 | Time | 1 2 3 | |
Student Work Sheet
MEASURMENT
I. Purpose
a. to be able read scale of micrometer screw gauge and vernier
caliper
b. to be able use the rule of significant numbers
II. Instrument and materials
a. coin
b. vernier caliper
c. micrometer screw gauge
d. ruler
III. Activity step’s
1. measure the thickness of coin by using ruler
2. measure the thickness of coin by using vernier caliper
3. measure the thickness of coin by using micrometer screw gauge
4. measure the diameter of coin by using ruler
5. measure the diameter of coin by using verniert caliper
IV. Observation data
Table 1
| No | Measurement equipments | The thickness of coin | How to report the result of measurement | Significant numbers |
| 1 2 3 | Ruler Fernier caliper Micrometer screw | | | |
Table II
| No | Measurement equipment | Diameter of coin | How to report the result of measurement | Significant numbers |
| 1 2 | Fernier caliper Micrometer screw gauge | | | |
V. Evaluation
1. from table 1 observe the significant number with the minimum significant number in measurement equipment
2. From three of measurement equipments according to you, which one is most rigorous?
3. The rigorous of measurement equipment prescribed by what?
4. from table 1 and 2 , calculate :
a. circumference circle (by using the rule of significant numbers)
b. the area of circle (by using the rule of significant numbers)
c. thickness + diameter (by using the rule of significant)
STUDENT WORK SHEET
MEASUREMENT UNCERTAINTY
I . Purpose : a. can discriminate absolute uncertainty and relative uncertainty
b. can calculate relative uncertainty
c. can identification accurate and accuracy measurement
II . Observation data :
Table 1
Complete!
| No | Instrument to measure | Thick metal (mm) | Method to report result measurement | Sum of significant number | Absolute uncertainty | Relative uncertainty | Note |
| 1 2 3 | Ruler Fernier caliper
Micrometer screw | 2 1,9 1,89 | 2 ± 0,5 1,9 ± 0,020 1,89 ± 0,0100 | 1 2 3 | | | |
Table 2
Complete!
| No | Instrument | Diameter metal (mm) | Method to report result measurement | Sum of significant number | Absolute uncertainty | Relative uncertainty | Note |
| 1 | fernier caliper
| 23,3 | 23,3 ± 0,020 | 3 | | | |
| 2 | Micrometer screw | 23,25 | 23,25± ,0,01 | 4 | | | |
CONCLUSION
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