FörberedandeFysik

a) \displaystyle l = l_0 \sqrt{1-(v/c)^2} = 2800\, \textrm{m} \sqrt{1-(8{,}0\cdot 10^7\,\textrm{m/s}/c)^2} \approx 2700\, \textrm{m}

b)\displaystyle \Delta t = \displaystyle\frac{2800\, \textrm{m}}{8{,}0\cdot 10^7\,\textrm{m/s}} = 3{,}5\, 10^{-5}\, \textrm{s}

c)\displaystyle \Delta t = \displaystyle\frac{l\, \textrm{m}}{8{,}0\cdot 10^7\,\textrm{m/s}} = 3,4\, 10^{-5}\, \textrm{s}