Two linear polarizing filters are placed one behind the other, so that their transmission directions are parallel to one another. a beam of unpolarized light of intensity io is directed at the two filters. what fraction of the light will pass through both filters?
a.0.5 io
b.0
c.2 io
d.0.25 io
e. io

An electric current is flowing through the cord below. what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

This is the substance(s) formed in a chemical reaction.

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero