Which Two Elements Make Up More Than 90% of the Dry

question 66

Multiple Choice

Which two elements make up more than 90% of the dry weight of plants?

• A) carbon and nitrogen
• B) oxygen and hydrogen
• C) nitrogen and oxygen
• D) oxygen and carbon
• E) carbon and potassium

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Definitions:

Timing Relays

Electromechanical devices that enable timed events in a control circuit, such as delays in switching.

Contactors

Electrically controlled switches used for switching an electrical power circuit, similar to a relay but capable of handling higher currents.

Armatures

The component of an electric machine (like a motor or generator) that carries alternating current and interacts with a magnetic field to produce motion.

Yoke

In electrical engineering, a yoke is the frame that holds or supports magnetic core materials in devices like transformers or some types of motors, contributing to the magnetic circuit's path.