An 8.0 12 resistor and a 3.0 12 resistor are connected in series with a battery. The po-
tential difference across the 3.0 12 resistor is
measured as 6 V.
Find the potential difference across the bat-
tery.

Explanation is in the file

cutt.ly/nz6VGda

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.

wavelength divides in half and speed stays the same.