Compare and contrast horticultural societies with agricultural societies.

What are seismic dampers and why are they important?

Where does the availability of water pose the greatest problem

[ou.01jthe greatest speed with which any physical object moves is 300,000 km/soundsec. which of the following has a speed of 300,000 km/sec? a. light in water b. light in vacuum c. sound in air. d. sound in water