What percentage of the solar radiation entering the atmosphere is absorbed by the earth’s surface

20%
19%
51%

Why is metal often used for cooking pan?

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

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.