Suppose our sun is about to explode. in an effort to escape, we depart in a

spaceship at v = 0.80c and head toward the star tau ceti, 12 lightyears away.

when we reach the midpoint of our journey from the earth, we see our sun

explode and, unfortunately, at the same instant we see tau ceti explode as well.

a) in the spaceship’s frame of reference, should we conclude that the two

explosions occured simultaneously? if not, which occured first?

b) in a frame of refernece in ehich the sun and tauceti ar at rest, did they

explode simultaneously? if not, which exploded first?

your answer would be fusion

a displacement distance is size of displ

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.