What term refers to the high and low frequency that we hear in music

:) this measure should equal four beats. which note needs a dot added to make the measure correct? assume that a quarter note equals 1 beat.

Suppose that you are in a room with 3 doors and a crack in the ceiling for light. that is all. the doors each have a sign on them that says what there is behind them. door #1. a pool of corrosive acid. door #2. a crocodile that hasn't eaten in 8 months. door #3. a solar "oven". a giant lens that focuses all the sunlight at the entrance of the door. you must choose a door, which door do you choose?

What consists of electronic components that store instructions ready to be executed and the data needed by those instructions