gelatin block with mass 1.00kg is sitting at rest on top of a horizontal surface. The coefficient of kinetic friction between the block and the surface is 0.70. A small steel ball with mass 10.9g is moving horizontally directly at the center of the block with a speed of 853m/s. The ball then collides with the block and gets stuck inside of it.  Assuming that the block stays in one piece, how much of the initial kinetic energy of the ball was converted into overall (heat + light + sound + material distortions) energy during the collision?

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