1. stress strain 3. toughness the force required to deform an object long, chainlike molecules made up of repeating units joined end to end the measure of the reversible alteration of the form or dimensions of a solid body the energy required to crack a material the quantity that characterizes how a solid is deformed due to an applied force 4. polymer 5. elasticity

The answer is    (d) 7/2======we have    we also  have an integral      notice how function f splits up at x = 0. there's a left piece and a right pieceso we'll need to do the same thing with our integral: split it at x = 0we use a property of integrals that allows us to split up and sum:     notice that for the piecewise function f, the function has the equationf(x) = x when x  ≤ 0. so for the integral  , f(x) = x so it changes into      for the piecewise function f, the function has the equationf(x) = x+1  when x  > 0. for the integral  , we have    therefore, back to our splitted integral: