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| Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
|---|---|---|---|---|---|---|
| 1.1 | Units. Systems of Units. Fundamental and Derived SI Units |
Correct Answer: D
Correct Answer: A
Clarification: Every year scientist make new discoveries in science and, since each new physical quantity discovered has its own definition and unit, there is an undefined number of derived SI units in science. Also, derived units are not obtained only when two or more different units are combined together; they also exist even if we use the same unit more than once, such is the case of surface area or volume.
Correct Answer: B
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