A cold metal spoon is placed in a bowl of hot soup. The soup is left on a table where it cools to room temperature. Which of the following statements is true? A. The soup transfers heat to the air, while the metal spoon remains at room temperature.

B. The air cools the soup.

C. The soup transfers heat to the metal spoon and to the air.

Which sound characteristic is not affected by the relative motion of an object

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 role of lenses in microscopy?