waec model questions vol1 2019 physics
Objective • Question 15
Question 15
WAEC_MODEL_QUESTIONS_VOL1
•
2019
A length measured as 0.00345 m is to be expressed (i) in millimetres, (ii) in micrometres, and (iii) in scientific notation with three significant figures. State the three values.
Answer Options
A.
3.5 mm, 3500 µm, 3.5×10^-3 m
B.
3.45 mm, 3450 µm, 3.45×10^3 m
Correct Answer
C.
3.45 mm, 3450 µm, 3.45×10^-3 m
D.
0.345 mm, 345 µm, 3.45×10^-4 m
Correct Answer
C
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