Write the method to reduce polarization effect in dry cell​

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

For which pair of objects would adding the same a

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?