Volcanic Rocks, and the Magma from Which They Formed, Have

question 23

True/False

Volcanic rocks, and the magma from which they formed, have a silica content that ranges from 45% to 75% by volume.

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Definitions:

TOF

Stands for "Timer Off-Delay," a function in PLC programming where a timer starts counting when the input turns off.

Timer Off-delay

A timing function in control systems that keeps the output active for a predetermined time after the input signal has been turned off.

Output Coil

In programmable logic controllers (PLCs), an output coil represents a device or actuator to be controlled by the PLC's program.

TON Instruction

A timer instruction used in programming that starts timing when the input condition becomes true and continues until the set time has elapsed.