How Does a Seismograph Detect Vibrations from the Passing Wave

question 124

Multiple Choice

How does a seismograph detect vibrations from the passing wave front of an earthquake?

• A)The whole instrument moves up and down (or back and forth)on the ground, so that it starts jiggling a little weight inside that trips the detector to record the earthquake.
• B)The instrument is anchored to the ground or buried in a vault so that it is stationary with respect to the earth.When the instrument moves, the suspended mass inside is relatively stationary due to inertia.The relative motion registers the quake.
• C)The instrument vibrates with the ground as it rolls along a track above the hyypocentre.
• D)The wave front seeks out the instrument which stops vibrating when the wave front reaches it.

---

Definitions:

Expand

To increase in size, volume, number, or scope.

Outside Investors

Individuals or entities that invest capital in a business but are not part of its daily operations or management.

Penny Pinching

A term used to describe the act of being very careful with money and spending it sparingly.

Startup

A company or project in its early stages, typically focused on a single product or service and aimed at validating its market potential.