A copper wire of length 1.76 m is stretched by a force to a length
of 1.80 m. What is the tensile strain in
the wire?​

Could someone me find the answer to this problem.

Which lists the organs in the correct order as food passes from the mouth to anus?

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?