Per fer una ecografia, la màquina d’ultrasons emet ones sonores que viatgen pel cos del pacient a una velocitat de 1.540 m/s. Quina magnitud mesura la màquina per
calcular la distància a la que es troba l’òrgan del cos que es vol estudiar?

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.

the rearrangement of particles in a physical change. hope this

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

365.25 earth days are in the year of a light year