The source of electrons in an ordinary electrical circuit is
A) a dry cell, wet cell, or battery.
B) the back emf of motors.
C) the power station generator.
D) the electrical conductor itself.
E) none of the above
D
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Useful simplifications of a more complex reality do NOT include:
a. photographs, diagrams, and satellite image. b. maps and globes. c. areas of land smaller than 259 square kilometers (100 square mi.). d. conceptual models.
What is the most densely settled island of Indonesia?
A) Luzon
B) Borneo
C) Bali
D) Java
E) Sumatra
Which of the following democracies represents a unitary state in which power is concentrated in the hands of the central government?
A) India B) France C) South Africa D) Russia E) the United States
What line or region best corresponds with the location of E climates?
A) Continental interiors, northern hemisphere B) High latitudes C) Equator, low elevations D) Coastal locations, midlatitudes