How light recats with each of diffrent types of space and materials

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.

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

Arrange the images in order to show how lake-effect snow occurs.