About 85% by Mass of Earth's Core Is Composed of the Element(s)

question 106

Multiple Choice

About 85% by mass of Earth's core is composed of the element(s)

• A) iron
• B) nickel
• C) oxygen.
• D) silicon.
• E) iron and nickel.

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Definitions:

Armature

The rotating part of an electric generator or motor that interacts with the magnetic field to produce or use electricity.

Series

A connection of electrical components in a circuit end-to-end such that there is only one path for current flow, leading to the same current through all components.

Two-phase Power System

A two-phase power system is an electrical power distribution method that uses two alternating currents, which are offset in phase by one-quarter of a cycle (90 degrees).

Phase

A measure of the position of a point in time on a waveform cycle, often used in the context of alternating currents to describe the difference in timing between two waveforms.