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Question 1
The sum of two vectors $\vec{a}$ and $\vec{b}$ is a vector $\vec{c}$ such that $|\vec{a}|=|\vec{b}|=|\vec{c}|=2$. Then, the magnitude of $\vec{a}-\vec{b}$ is equal to:
A.
$2\sqrt{3}$
B.
$2$
C.
$\sqrt{3}$
D.
$0$
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