Around which months does el nino end and la nina start?

The metric unit of electrical power is the watt volt ampere ohm

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Which articulations allow for greatest range of motion?