7. which is the best example of a hypothesis? water changes into steam if it is boiled. if water is boiled, it will turn into steam. if the temperature of water is increased, then it will change into steam. when the temperature of water is increased, it changes into steam.

Asolid round steel rod 6.25 mm in diameter and 375 mm long is rigidly bonded to the end of solid square brass rod 25 mm on a side and 300 mm long. the geometric axes of the bare are along the same line. an axial tensile force of 5.4 kn is applied at the extreme ends of the assembly. for steel e = 200 gpa and for brass e = 90 gpa. determine the total elongation for the assembly.