How does frictional force produce. write down any two effect friction.​

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?

What is offspring? why does a longer life span mean a higher chance of producing offspring?

If you drive 12 miles north and 35 miles east, what is the direct distance between you and your starting point?