The speed of light is approximately 3imes1083 imes 10^83imes108 m/s. If a star is 4 light-years away, what is its distance in kilometers? (1 light-year = distance light travels in one year)
3.8imes10103.8 imes 10^{10}3.8imes1010 km
1.2imes10131.2 imes 10^{13}1.2imes1013 km
3.8imes10133.8 imes 10^{13}3.8imes1013 km
1.2imes1091.2 imes 10^91.2imes109 km
Related Questions
The dimensional formula of magnetic induction B is
[M0ALT0]\left[ {{{\rm{M}}^0}{\rm{AL}}{{\rm{T}}^0}} \right][M0ALT0]
[M0AL−1T0]\left[ {{{\rm{M}}^0}{\rm{A}}{{\rm{L}}^{ - 1}}{{\rm{T}}^0}} \right][M0AL−1T0]
[M0AL2T0]\left[ {{{\rm{M}}^0}{\rm{A}}{{\rm{L}}^2}{{\rm{T}}^0}} \right][M0AL2T0]
[MT−2A−1]\left[ {{\rm{M}}{{\rm{}}}{{\rm{T}}^{ - 2}}{{\rm{A}}^{ - 1}}} \right][MT−2A−1]
In the formula, a=3bc2,aa = 3b{c^2},aa=3bc2,a and c have dimensions of electric capacitance and magnetic induction respectively. What are dimensions of b in MKS system?
[M−3L−2T4Q4]\left[ {{{\rm{M}}^{ - 3}}{{\rm{L}}^{ - 2}}{{\rm{T}}^4}{{\rm{Q}}^4}} \right][M−3L−2T4Q4]
[M−3T4Q4]\left[ {{{\rm{M}}^{ - 3}}{{\rm{T}}^4}{{\rm{Q}}^4}} \right][M−3T4Q4]
[M−3T3Q]\left[ {{{\rm{M}}^{ - 3}}{{\rm{T}}^3}{\rm{Q}}} \right][M−3T3Q]
[M−3L2T4Q−4]\left[ {{{\rm{M}}^{ - 3}}{{\rm{L}}^2}{{\rm{T}}^4}{{\rm{Q}}^{ - 4}}} \right][M−3L2T4Q−4]
