  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.
France began development in late 1915, eventually creating the Renault FT light tank. This was the first to use a fully rotating turret that contained the tankâs main armament - the basis of tank design ever since. Over 3,000 of these machines were made by late 1918. By contrast, Germany lagged behind.