The resultant of two forces P N and 3 N is a force of 7 N. If the direction of 3 N force were reversed, the resultant would be 19N. The value of P is
Two wires are made of the same material and have the same volume. However wire 1 has cross-sectional area A and wire -2 has cross-sectional area 3A. If the length of wire 1 increases by Δx on applying force F, how much force is needed to stretch wire 2 by the same amount ?
The equation of a tangent to the parabola y2=8x is y=x+2. The point on this line from which the other tangent to the parabola is perpendicular to the given tangent is
The coodination number and the oxidation state of the element 'E' in the complex [E(en)2(C2O4)]NO2 (where (en) is ethylene diamine) are, respectively,