1. A main limitation of using low beam energies is the reduced mass resolution. 2. Where M is the total mass and \ mu is the reduced mass . 3. Instead, the designers selected a cantilever structure using high-strength steel, to reduce mass . 4. The use of solar dynamic could reduce mass per watt. 5. A reduced mass is also directly felt when accelerating. 6. Thus, for positronium, its reduced mass only differs from the electron by a factor of 2. 7. To analyze the motion of the electron, a one-body problem, the reduced mass replaces the electron mass 8. Classically we can say that a system with a large reduced mass has a long orbital period. 9. The aluminum block reduces mass and has great thermal characteristics, giving customers improved performance and fuel efficiency. 10. Revenues from the tax would also help reduce mass transit fares during times of gas price spikes.