Acylinder with rotational inertia i l = 2.0 kg . m2 rotates clockwise about a vertical axis through its center withangular speed ml = 5.0 rad] s. = 5.0 rad/s. a second cylinderwith rotational inertia [2 = 1.0 kg . m2rotates counter clockwise about the same axis with angular speed m2 = 8,0 rad/s , if the cylinders couple so theyhave the same rotational axis what is the angular speed of the combination? what percentage of the original kineticenergy is lost to friction?

it is lost the 98.82% of the energy.  

Explanation:

for answer this, we will use the conservation of the angular momentum L:

so:

where is the moment of inertia, is the angular velocity of the cylinder 1, is the moment of inertia of the second cylinder, is the angular velocity of the second cylinder, is the moment of inertia of the cylinders couple and is the angular velocity of the cylinders couple

note: we will take the clockwise rotation as positive.

Replacing the values, we get:

solving for :

for find the kinetic energy lost we must calculate the initial Ei and the final energy Ef as:

and,

now, the percentage of the original kinetic energy that is lost to friction is calculated as:

= 0.9882 = 98.82%

that means that was lost the 98.82% of the energy.

the plateau is likely to turn into a desert do to corrosion.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me