James Chadwick like Ernest Rutherford had to infer that neutrons were present in atoms he made inferences based on observations of the behavior of Adams during experimental testing using evidence from worth a gold foil experiment defend the claims scientific knowledge is based on observation and inference

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.