No, it is not possible to have two different versions of the planeswalker card "Jace" on the battlefield at the same time in a game of Magic: The Gathering.
Both are the same but it they are different in their looks of everything :D
No.
I'd simply guess that Battlefield 3 limited edition is not THAT much different to the original version of Battlefield 3, there would be some added content - but that's a given. The gameplay though, would remain the same.
yes it is possible
Yes, different isotopes of the same element have different masses.
No, it is not possible for two police officers to have the same badge number.
It is possible only because of different number of neutrons.
No
yes it is possible
Yes, it is possible to have two different lines with the same slope. In the context of linear equations, if two lines have the same slope but different y-intercepts, they are parallel and will never intersect. However, if they have the same slope and the same y-intercept, they are actually the same line, not two different lines.
no
No.