Aman stands on a platform that is rotating (without friction) with an angular speed of 2.00 rev/s; his arms are outstretched and he holds a brick in each hand. the rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 7.55 kg·m2. if by moving the bricks the man decreases the rotational inertia of the system to 1.22 kg·m2, (a) what is the resulting angular speed of the platform and (b) what is the ratio of the new kinetic energy of the system to the original kinetic energy?

Imagine an isolated positive point charge q (many times larger than the charge on a single proton). there is a charged particle a (whose charge is much smaller than charge q) at a distance from the point charge q. on which of the following quantities does the magnitude of the electric field created by charge q at particle a's position depend? check all that apply. the type of the charge on the charged particle athe relative orientation between q and a (while the distance between q and a is fixed)the specific location of the charged particle a (while the distance between q and a is fixed)the amount of the charge on the point charge qthe specific location of the point charge q (while the distance between q and a is fixed)the distance between the point charge q and the charged particle athe amount of the charge on the charged particle a