Asystem consists of a disk of mass 2.87 kg and radius 50 cm upon which is mounted an annular cylinder of mass 2.03 kg with inner radius 20 cm and outer radius 30 cm (see below). the system rotates about an axis through the center of the disk and annular cylinder at 18.6 rev/s. what is the systems rotational kinetic energy?

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave

What are two different ways you could find the value of a? explain these methods.

An electromagnet is a device in which moving electric chargers in a coil of wire create a magnet. whats one advantage of using electromagnetic in devices