Which of these is an example of solar energy? a) heating a pot of water on a stove b) heating water in the sun to make tea eliminate c) cooling a house with an electric fan d) cooling a house by pulling down shades

What are the factors that affect the resistance of a wire?

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.

Give an example in which the electrical energy changes to light energy