If length of wire is doubled keeping the diameter constant ,its youngs modulus will be

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west