A disk of radius R and mass M is spinning at an angular velocity ω0 rad/s. A non-rotating concentric disk of mass m and radius r drops on it from a negligible height and the two rotate together. If R is 1.5 of r and M is 1.2 of m, what is the final angular velocity in terms of ω0? The moment of inertia of a solid cylinder is (1/2)MR2. (First got 0.64ω0, the second time I got 0.56 ω0)

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.