Una motocicleta alcanza una velocidad de 130 km/h, en 20m ¿Cuál el tiempo empleado?

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

3. dark matter

empty space could also be a simple vacuum

the tires are rotating at 0.434 rpmlinear speed=45 m/sdiameter=0.550 mradius=0.275 mnow v= rωω= v/rω=45/0.275ω=163.6 rad/sω=163.6 rad/s (1rev/2π rad) (60s/1m)ω=1563 rpm