Two guys who weight the same are holding onto a massless pole while standing on horizontal frictionless ice.
1)If the guy on the left starts to pull on the pole, where do they meet?
-3 m
0
+3m

the reason is because the moon has some form of gravity, and that gravity pulls the ocean tides.

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

i think its d if wrong im sorry