1 vật dao động điều hòa với phương trình x = 4cos (2Πt + Π/2) cm. Xác định thời điểm vật đi qua vị trí x = +4

Drag each item into the proper state of matter category.

At the negative terminal of the battery the electron has electric potential energy. what happens to this energy as the electron jumps from the negative to the positive terminal?

Which statement correctly describes the interaction between magnetic poles? north and south poles attract each other. north and south poles repel each other. two north poles will attract each other. two south poles will attract each other.