The Mechanism That Leads to the Double-Radio Source Phenomenon Appears

question 4

Multiple Choice

The mechanism that leads to the double-radio source phenomenon appears to be

• A) two active galaxies in orbit around a common center, like a binary star system.
• B) two oppositely directed jets of energetic particles from an active galactic object colliding with other intergalactic material.
• C) a radio-bright galaxy crossed by a dark, absorbing, edge-on disk, splitting the radio emissions into two as seen from Earth.
• D) gravitational lensing of a distant radio source by a nearby galaxy or black hole.

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Definitions:

Nonretentive

In PLC programming, a term referring to memory or data that is not retained after power loss.

Retentive Timer Reset

A function in PLC programming that allows a timer to retain its accumulated value even after a reset condition has been removed or power to the PLC has been cycled.

Timer Resets

The process of returning a timer to its initial state or set value in control systems or programming.

Maximum Preset Time

The highest period that can be preconfigured for a timer or similar device before it triggers an event or action.