Which of the following is an example of a surface wave? A. A wave traveling down a stretched Slinky toy, with both ends held fixed.

B. A wave of ocean water as it reaches the beach.

C. A wave traveling down a long, stretched string, with both ends held fixed.

D. A wave on the surface of a drum that has been struck.

Which of the following represents an upside-down image?

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)