Rowerzystka poruszająca się ruchem jednostajnym wzdłuż osi x może się oddalać od punktu zero lubzbliżać do niego. Zaznacz wszystkie poprawne dokończenia zdania. Wykres zależności położenia rowerzystki od czasu poprawnie przedstawiono na rysunku

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

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?

Difference between series and parallel circuits