EPS 7 Lecture Notes - Lecture 30: Gravitational Energy, Kinetic Energy, Electrical Energy

• School: Berkeley
• Department: Earth And Planetary Science
• Course: EPS 7
• Professor: David Romps

Document Summary

How do we use energy: transport, buildings, industry. Americans consume 10kw/person, mostly by burning coal, oil, and gas. The world population is headed to roughly 10 billion. How much power will the entire world need to live like americans? (10 kw/person) x (10 billion person) = (10 x 1000 w/person) x (10 billion person) To achieve zero carbon emissions, we must electrify everything. With the exception of a small amount of biofuel, all zero- carbon energy sources produce electricity. A joule of heat or a joule of electricity. We don"t need 100 tw of electrical energy! Since electrical energy is a high-grade energy, we do not need 100 tw of electricity, we need only 60 tw. Current: 20 tw with 5 tw of potential biomass. This means that an object falling towards earth gains 10 m/s of speed every second. Tesla: 0 to 60 mph in 2. 5 s.