مؤلف: Leon Sinclair

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2 كتب إلكترونية بواسطة Leon Sinclair

Leon Sinclair: Near-Earth Objects
Scientists classify comets and asteroids that pass within 28 million miles of Earth’s orbit as near-Earth objects (NEOs). Asteroids that collide and break into smaller fragments are the source of mos …
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€238.58
Emmanuel Martinez: Electricity Reliability in the United States
Since the 1960s, the U.S. electric power system has experienced a major blackout about once every 10 years. Each has been a vivid reminder of the importance society places on the continuous availabil …
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€244.68