The star delta goes supernova. one year later and 2 ly away, as measured by astronomers in the galaxy, star epsilon explodes. let the explosion of delta be at xd=0 and td=0 . the explosions are observed by three spaceships cruising through the galaxy in the direction from delta to epsilon at velocities v1=0.3c, v2=0.5c and v3=0.7c.

1. what are the times of the two explosions as measured by scientists on each of the three spaceships? the times are given in years.
2.does one spaceship find that the explosions are simultaneous? if so, which one?
3. does one spaceship find that epsilon explodes before delta? if so, which one?
4. do your answers to parts b and c violate the idea of causality?

i believe it is b. what was the cause of the big bang

hope this !

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

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