Cho 4 điện tích bằng 40µC được đặt tại 4 điểm A(4,0,0), B(0,4,0), C(-4,0,0) và D(0,-4,0). Tìm lực tác dụng lên điên tích 40µC đặt tại P(0,0,3).

The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers total displacement?