geophysics lec 3 seismic

invented the first functional Seismoscope

• 132 AD: Chang Heng

• 1638: Galileo Galilei

• 1660: Robert Hooke

• 1820s: Claude-Louis Navier

He discovered that as the length of a beam increases, its strength decreases, unless you increase the thickness and breadth

• 132 AD: Chang Heng

• 1638: Galileo Galilei

• 1660: Robert Hooke

• 1820s: Claude-Louis Navier

Proposed a new science, the study of strength of materials, that considered the size and shape of structural members affects their ability to carry load.

• 132 AD: Chang Heng

• 1638: Galileo Galilei

• 1660: Robert Hooke

• 1820s: Claude-Louis Navier

-proposed an Ultra Low Velocity Zone (ULVZ) in the lowermost mantle on seismic evidence

• 1996: Williams and Garnero

• 1638: Galileo Galilei

• 1660: Robert Hooke

• 1820s: Claude-Louis Navier

A physicist known for establishing the law of spring

• 1638: Galileo Galilei

• 1660: Robert Hooke

• 1820s: Claude-Louis Navier

• 132 AD: Chang Heng

completed the foundations of modern elasticity theory

for elastic behavior, the strain in a body is proportional to the stress applied to it. This linear relationship is called Hooke’s law. It forms the basis of elasticity theory

• Law of Spring

• elastic behavior

• Hooke's Law

• Birch's Law

In Birch's Law, igneous and metamorphic crustal rocks generally have _ seismic velocities than those in sedimentary rocks

• higher

• lower

• mid

• proportional

also referred to as Hookean behavior.

• Law of Spring

• elastic behavior

• Hooke's Law

• Birch's Law

linear relationship between seismic velocities and density

• Law of Spring

• elastic behavior

• Hooke's Law

• Birch's Law