Conservative of mass states that the amount of matter can not be (blank) or destroyed

Which fators influence ocean currents

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.