What are the changes that occur in the skin when the temperature is hot and when it is cold.​

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

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat