Basic Units, Derived Units, and Scientific Notation (Leaving Cert Physics): Quizzes

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Basic Units, Derived Units, and Scientific Notation
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Which of these is a basic SI unit in physics?

Metre

What is the SI unit for electric current?

Ampere

How are derived units formed?

By combining basic units

What is the derived unit for volume?

m3m^3

What is 1 newton (N) expressed in basic units?

1 kg⋅m⋅s−21 \, \text{kg} \cdot \text{m} \cdot \text{s}^{-2}

What is 1 joule (J) in basic units?

1 kg⋅m2⋅s−21 \, \text{kg} \cdot \text{m}^2 \cdot \text{s}^{-2}

What is 1 watt (W) in basic units?

1 kg⋅m2⋅s−31 \, \text{kg} \cdot \text{m}^2 \cdot \text{s}^{-3}

What does the prefix 'kilo' (k) represent?

10310^3

What does the prefix 'nano' (n) represent?

10−910^{-9}

What does the prefix 'mega' (M) equal?

10610^6

When converting to a smaller unit, what operation do you perform?

Multiply by conversion factor

In scientific notation a×10na \times 10^n, what range must 'a' be in?

1≤a<101 \leq a < 10

What is 3000 in scientific notation?

3.0×1033.0 \times 10^3

What is 0.0001 in scientific notation?

1.0×10−41.0 \times 10^{-4}

How many significant figures does 0.00234 have?

3

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