We have vacuum for s < a and s > b. What does that tell you about P⃗ in those regions? Find the bound charges σb and rhob (σb on the inner and outer surface of the hollow rod and rhob everywhere else.) What are the units of C?

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.

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

What sort of waves exhibit the doppler effect?