Answer: D) None of the above
Explanation: The subschema differs from the schema in that one denotes the appearance of data in the Database Base Management System (DBMS) while the subschema which is also referred to as the external schema is that subset of the schema is visible or relevant to the user. Thus, It is the view of the database which is visible to an application program. Virtual tables in a database usually represents an object structures like a table which is the result of running certain database commands or functions such as the create table, view, select and so on. Virtual tables are not stored directly in database files.
Glaciers shaped the landscape is the answer. Actually, in Nova Scotia near Halifax there is a glacial boulder or erratic of basalt which is deemed to come from about 130km away perhaps from the north or NW. Also, there are glacial striations there on the bedrock which can be used to determine the sense of the direction of flow of the ice. In New England, there are pro-glacial lakes. Both the Maritimes and New England were most likely covered by the Laurentide continental glaciation.
<span>When
valley inversion occurs especially on farming, settlement and industry, it will
cause air to become stiller and murky due to the dust particles suspended
within the layer and pollutants that are heavy enough to move. It will cause health
problems such as asthma, heart attack. Also, the people living in that are may
not see what is in front of them due to air becoming thicker.</span>
Planet A is an outer planet, and Planet B is an inner planet, then Planet A will spin (rotate on its axis) faster than Planet B.
Using our Solar System as a model, we may determine the following:
The inner planets, which include our Earth, Mercury, Venus, and Mars, revolve more slowly than the outer planets (such as Jupiter, Saturn, Uranus and Neptune). The reason for this is because the nearest planets are held firmly in place as they revolve around the Sun due to the massive gravitational field of the star.
However, for the same reason (because of their proximity to the Sun's gravitational field), inner planets complete one circle around the Sun faster than outer planets.
As a result, Planet A will spin (rotation on its axis) faster than Planet B if Planet A is an outer planet and Planet B is an inner planet.
Learn more about Inner Planet and Outer Planet here:
brainly.com/question/15524842
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