When two polarizers are overlapped, what angle relative to one another will allow for all of the incoming light to be blocked? *

What’s #16 asking and how do i solve it?

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.