Match each natural polymer to its use. natural rubber
used in the making of ties and fabric
DNA
used to carry genetic information
cellulose
used as food and in paper making
Silk
used in the production of rubber
bands
starch
used in the production of jeans

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?