When an electron and its antiparticle (positron) combine, they annihilate each other
and become energy in the form of gamma rays.
9. What conservation law prevents this from happening
with two electrons?
10. The positron has the same mass as the electron.
Calculate how many joules of energy are released
when they annihilate. [Show all work, including the
equation and substitution with units.]

grav potential energy

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

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.