For the following question, imagine the book drops in free fall and falls a distance d.
1. For the system of the book and earth, the change in total energy of the system if the book falls a distance d.
O positive.
O is negative.
O is zero.
O has a sign which cannot be determined.
2. For the system of the book and earth, the network done on the system by external forces as the book falls a distance d.
O is positive.
O is negative
O is zero.
O has a sign which cannot be determined.

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide

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.