Question

What phy.

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Answer 1

Answer:

The science of matter and energy, and their properties and interactions in fields including

• mechanics,
• acoustics,
• optics,
• heat,
• electricity,
• magnetism,
• radiation, and
• atomic and nuclear science.

Physics is the science of how things work.

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Answer 2

Answer:

A PHY, an abbreviation for "physical layer", is an electronic circuit, usually implemented as an integrated circuit, required to implement physical layer functions of the OSI model in a network interface controller. A PHY connects a link layer device to a physical medium such as an optical fiber or copper cable.