Explica cómo se realiza la carrera de obstáculos​

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

Atomic nuclei of almost all elements consist of

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?