(i)
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kg is a scalar quantity because it has only magnitude.
(ii)
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meters north-west is a vector quantity as it has both magnitude and direction.
(iii)
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is a scalar quantity as it has only magnitude.
(iv)
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watts is a scalar quantity as it has only magnitude.
(v)
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coulomb is a scalar quantity as it has only magnitude.
(vi)
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is a vector quantity as it has both magnitude and direction.