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
How many milligrams are there in 2 grams?
20 mg
200 mg
2000 mg
0.002 mg
What is the dimensional formula of mc2m{c^2}mc2, where the letters have their usual meanings?
[MLT−1]\left[ {{\rm{ML}}{{\rm{T}}^{ - 1}}} \right][MLT−1]
[ML0T0]\left[ {{\rm{M}}{{\rm{L}}^0}{{\rm{T}}^0}} \right][ML0T0]
[ML2T−2]\left[ {{\rm{M}}{{\rm{L}}^2}{{\rm{T}}^{ - 2}}} \right][ML2T−2]
[M−1L3T6]\left[ {{{\rm{M}}^{ - 1}}{{\rm{L}}^3}{{\rm{T}}^6}} \right][M−1L3T6]
Dimensional formula for force is
[M1L2T−2]\left[ {{M^1}{L^2}{T^{ - 2}}} \right][M1L2T−2]
[M1L1T−2]\left[ {{M^1}{L^1}{T^{ - 2}}} \right][M1L1T−2]
[M1L−1T−2 ]\left[ {{M^1}{L^{ - 1}}{T^{ - 2}}\;} \right][M1L−1T−2]
[M1L−2T−2]\left[ {{M^1}{L^{ - 2}}{T^{ - 2}}} \right][M1L−2T−2]
The dimensions of farad are
M−1L−2T2Q2{M^{ - 1}}{L^{ - 2}}{T^2}{Q^2}M−1L−2T2Q2
M−1L−2TQ{M^{ - 1}}{L^{ - 2}}TQM−1L−2TQ
M−1L−2T−2Q{M^{ - 1}}{L^{ - 2}}{T^{ - 2}}QM−1L−2T−2Q
M−1L−2TQ2{M^{ - 1}}{L^{ - 2}}T{Q^2}M−1L−2TQ2
If force (F), mass (M), length (L) are taken as fundamental quantities, dimensions of the time will be
[MLF]\left[ {MLF} \right][MLF]
[MLF−1]\left[ {ML{F^{ - 1}}} \right][MLF−1]
[M1/2L1/2F1/2]\left[ {{M^{1/2}}{L^{1/2}}{F^{1/2}}} \right][M1/2L1/2F1/2]
[M1/2L1/2F−1/2]\left[ {{M^{1/2}}{L^{1/2}}{F^{ - 1/2}}} \right][M1/2L1/2F−1/2]
