An AK47 (Kalashnikov Rifle) shoots bullets that have a mass of 7.90g. The design of the AK47 rifle has a string with a "k" value of 203000 N/m. The spring is compressed 14.0cm to shoot the bullet. Once the bullet leaves the gun, it travels and embeds itself in a block with a mass of 7.24kg. What is the speed of the block + bullet once the bullet hits the block?

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