In the figure below,what is the approximate speed of S-waves at the 670km discontinuity? 
Definitions:
Moscow
The capital city of Russia, known for its historical architecture, cultural institutions, and as a significant political and economic center.
Anwar Sadat
The third President of Egypt, who initiated peace with Israel leading to the Camp David Accords, and was assassinated in 1981.
US Military Support
Assistance provided by the United States armed forces, including logistical, intelligence, and combat support, to allies or other entities.
Israel
A country in the Middle East, established in 1948, known for its rich biblical history, cultural diversity, and geopolitical significance.
Q6: Pumice forms from the slow cooling of
Q6: A mudstone contains a higher proportion of
Q15: Air is 1200 times less dense than
Q15: Describe the main factors that affect how
Q16: All strategies and the action plans designed
Q47: Lord Kelvin based his estimate of Earth's
Q50: Beneath the surface,rocks completely melt at about
Q55: For the figure below give two possible
Q67: A strategic monitoring system alerts management of
Q67: _ is the force acting on a