El aire es compuesto un elemento una mezcla homogénea y una mezcla heterogénea​

think its the third option

i don't know that i agree with that but what's the question ?

true tan speed = ang vel x radius

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.