Explain the various factors that led to the growth of the Silk Road trade networks in the 1200 - 1450 time period

Ihave made a dive then stayed on the surface for a while. after this surface interval my pressure group is k. what is the maximum amount of bottom time available when doing a repetitive to 17/56 feet

Which statement describes absolute and apparent brightness? absolute brightness and apparent brightness are identical ways to describe the brightness of a star. absolute brightness and apparent brightness change with the distance from the star to the observer. absolute brightness depends on the distance from the star to the observer, whereas apparent brightness is always the same. absolute brightness is the actual amount of light produced by the star, whereas apparent brightness changes with distance from the observer.

Is the universal urge to strive for perfection in order to overcome feelings of inferiority. a. pleasure principle b. striving for superiority c. collective unconscious d. reality principle