I need a boyfriend. I’m a girl and I’m 17 turning 18...but who caresI need friends

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Unpolarized light whose intensity is 1.19 w/ is incident on a polarizer. (a) what is the intensity of the light leaving the polarizer? (b) if the analyzer is set at an angle of = 41.0∘ with respect to the polarizer, what is the intensity of the light that reaches the photocell?

Why does lightning travel from clouds to the ground?