An Earthquake Generates Three Kinds of Waves: Surface Waves (L-Waves),which

question 133

Multiple Choice

An earthquake generates three kinds of waves: surface waves (L-waves) ,which are the slowest and weakest,shear (S) waves,which are transverse waves and carry most of the energy,and pressure (P) waves,which are longitudinal waves and are the fastest.The speed of P waves is approximately 7 km/s,and that of S waves is about 4 km/s.People do not generally feel the P waves,but animals seem to be sensitive to them.If a person reports that her dog started barking 20 seconds "before the earthquake," then approximately how far was the origin of the earthquake?

• A)100 km
• B)200 km
• C)300 km
• D)400 km
• E)500 km

---

Definitions:

Feedback

Information given to individuals or groups about their performance or behavior, intended to guide future improvements or adjustments.

Situation

The set of circumstances or the context in which an event occurs or a decision is made, affecting its outcome.

Basic Colours

The fundamental colors from which all other colors can be mixed or created, often referred to as primary colors.

Interiors

generally relates to the design and adornment of the inside spaces of buildings, focusing on aesthetic and functional aspects.