When your school does the beatbox dance

J. j. thomson’s experiment disproved the theory that an atom

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

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.)