In a design test of penetration resistance, a 13-g bullet is fired through a 460-mm stack of fibrous plates with an entering velocity of 600 m/s. if the bullet emerges with a velocity of 360 m/s, calculate the average resistance r to penetration. what is the loss δq (enter as positive number) of energy and where does it go?

Scientific classification

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The correct option is this: the sound waves from the two trombones have slightly different frequencies.from the question given above, we are told that the loudness of the sounds were increasing and decreasing, this is because the frequencies of the two sounds are different. the means that the number of waves that pass a fixed point in a given amount of time differ for both sounds.