Population density<span> (in agriculture: standing stock and standing crop) is a measurement of </span>population<span> per unit area or unit volume; it is a quantity of type number </span>density<span>. It is frequently applied to living organisms, and most of the time to humans.</span>
Answer:
The car needs nearly 2.6 s
Explanation:
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The statement that correctly distinguishes between mechanical and electromagnetic waves is: "<span>Mechanical waves carry energy through matter; electromagnetic waves carry energy through space.</span>" Mechanical waves need a medium to propagate, therefore they can only carry energy through matter. Electromagnetic is not limited by vacuum, therefore they can carry energy through space.
