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What methods are you using to test this (or each) hypothesis?

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Will you chech and finish these for me, because i am stumped with them.

Dc versus ac problem. suppose your dc power supply is set to 15 v and the vertical setting on the oscilloscope is at 5 v/div. how many divisions will the trace deflect if you connect the output of the power supply to the scope with the a input switch set on dc? how many divisions if the switch is on ac?