A hollow steel sphere has outer radius Ro = 0.5 m. What is the inner radius that would make the sphere neutrally stable? Does it matter if the inside of the sphere is flled with air or not (i.e., a vacuum)?

Aluminum Rod#1 has a length L and a diameter d. Aluminum Rod#2 has a length 2L and a diameter 2d. If Rod#1 is under tension T and Rod#2 is under tension 2T, how do the changes in length of the two rods compare?

Helllo, Can someone please solve this problem? Thanks

= Replace the three forces acting on the plate by a wrench. Suppose that FA {600i} N, FB = and Fc {250j} N. (Figure 1) = Part A {-400k} N, Determine the magnitude of the force of the wrench. Express your answer to three significant figures and include the appropriate units. uA F = Value Units Submit Request Answer Part B ? Determine the couple moment of the wrench. Express your answer to three significant figures and include the appropriate units. Enter positive value if the sense of direction of the couple moment is the same as that of the resultant force and negative value if the sense of direction of the couple moment is opposite to that of the resultant force. M = Value Submit Request Answer Part C Units ? Specify the point P(x, y) where the wrench intersects the plate. Enter the x and y coordinates of the point separated by a comma using three significant figures. x, y = ΜΕ ΑΣΦ vec Submit Request Answer ? B