Explanation:
The velocity of car A relative to car B is (10km/h+40km/h)=50km/h
What distinguishes a nebula and a star is that a nebula is a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter. And a star is a<span> type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.</span>
0.008hertz is the correct answer
It goes faster or slower because there is more space inbetween