Two vectors 3 n to the north and x producers zero resultant .calculate x.

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Does heating a metal wire increase or decrease its electrical resistance? why?

Distinguish between linear momentum and angular momentum