[填空题]
Protons are injected j o(vy7uh;+pw l(5*z: xao;lhfkl f5xqtl8s* into the 1.0-km-radius Fermilab Tevatron with an energy of 150 GeV. If they are accelerated by 2.5 MV each revolution, how far do they travel and apslx5f(a: t*qo 8lh5 ;xzlflk*proximately how long does it take for them to reach 1.0 TeV? d$\approx $ $ \times 10^9\ \text{m}$
