Answer:
One well-known application of density is determining whether or not an object will float on water. If the object's density is less than the density of water, it will float; if its density is less than that of water, it will sink. ... In fact, submarines dive below the surface of the water by emptying their ballast tanks.
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D) The major part of economic activity focuses on information, knowledge, and the service industry.
Answer:
The main factors determining population distribution are : climate, landforms, topography, soil, energy and mineral resources, accessibility like distance from sea coast, natural harbors, navigable rivers or canals, cultural factors, political boundaries, controls on migration and trade, government policies
Explanation:
Speed only requires distance. Velocity requires direction.
AS speed is scalar quantity and have only magnitude of distance covered .
But velocity is a vector quantity.To describe completely direction is also required alongwith magnitude of distance.