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)

Three archers each fire four arrows at a target. joe’s four arrows hit at points 10 cm above, 10 cm below, 10 cm to the left, and 10 cm to the right of the center of the target. all four of moe’s arrows hit within 1 cm of a point 20 cm from the center, and flo’s four arrows hit within 1 cm of the center. the contest judge says that one of the archers is precise but not accurate, another archer is accurate but not precise, and the third archer is both accurate and precise. which description applies to which archer? explain

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b