The Hubble Constant,H₀,represents

question 28

Multiple Choice

The Hubble constant,H₀,represents:

• A) the rate of expansion of the universe.
• B) the speed at which galaxies are moving away from us.
• C) the time it takes a galaxy to move twice as far away from us.
• D) the size of the universe.

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Definitions:

Protocol

A formal definition of criteria for receiving and transmitting data through communications channels.

DeviceNet

An open, low-cost network protocol used in industrial automation to interconnect control devices for data exchange.

ControlNet

A robust industrial network protocol used for real-time, high-speed data communication among control devices.

Allen-Bradley Data Highway

A proprietary communication network used to connect Allen-Bradley PLCs and other devices for industrial automation.