5. george walks to a friend's house. he walks 750 meters north, then realizes he walked too far. he
turns around and walks 250 meters south. the entire walk takes him 13 seconds. what is his speed
per second?

77 m/s

Explanation:

Speed is distance divided by time.  His total distance is 1000 meters.  So his speed is:

s = 1000 m / 13 s

s ≈ 76.9 m/s

Rounded to two significant figures, his speed is 77 m/s.

spectral lines lyman is one set

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.