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A proton is traveling in an accelerator with a speed of 1.1×108 m/s . By what...

A proton is traveling in an accelerator with a speed of 1.1×108 m/s . By what factor does the proton's kinetic energy increase if its speed is doubled? Express your answer using two significant figures. The answer is in form: KE(2)/KE(1)=? (and the answer is not 4 or 5.5!)

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