(1).已知:v=3*10^8m/s s=384401km
求:t
t=s/v=384401km/3*10^8/s=384401000m/300000000m/s=1.281
(2).已知:s=1778+200km*3.14 t=127min
求:v
v=s/t=48.9
(1).已知:v=3*10^8m/s s=384401km
求:t
t=s/v=384401km/3*10^8/s=384401000m/300000000m/s=1.281
(2).已知:s=1778+200km*3.14 t=127min
求:v
v=s/t=48.9