Por una tubería fluyen 1200 litros de agua en 1 min. Calcula el flujo sí, la densidad del agua es 1010 kg/m3.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

490 n

f=125n a=2.5m/s2