  The electron and the proton have a negative electrostatic charge and a positive electrostatic charge respectively. Each charge-and the force associated with that unit of charge-is constant-and equal.(The electron and proton have equal, but oppositely polarized, electrostatic charges.) But there is more. The electron and the proton have a negative electrostatic charge and a positive electrostatic charge respectively. Each charge-and the force associated with that unit of charge-is constant-and equal.
The start of life for the tank did not bode well. The first model came off the factory floor on September 8th 1915. On September 10th, its track came off. The same happened on September 19th when government officials were watching.
Tanks: 1  The initial tanks of World War I were devised to counter the frustrating stalemate of trench warfare on the Western Front. 2  Tanks were introduced by the British in 1916. 3  Mobility of the tanks through the rough terrains came up as one of the primary issues concerned with the use of tanks.