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An earthquake emits both S-waves and P-waves which travel at different speeds through the Earth. A P-wave travels at 9 000 m/s and an S-wave travels at 5 000 m/s. If P-waves are received at a seismic station 1.00 minute before an S-wave arrives, how far away is the earthquake center?
Pull-in Current
The minimum current required to activate or "pull-in" a device, such as a relay or solenoid.
Actuate
To put into motion or action, typically referring to the operation of a mechanical device or system.
Applied Voltage
The voltage that is applied across a component or circuit, initiating its operation or influencing its performance.
Delay Relays
Delay relays are electromechanical or solid-state devices designed to delay the activation of an electrical circuit for a specified period, used in various timing and control applications.
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