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When a rifle is fired, the person firing the rifle absorbs the recoil. Consider an Olympic biathlete firing a competition rifle. Competition rifles have a mass of 3.5 kg and fire a 22 caliber bullet with a mass of 2g. The bullet leaves the barrel at 365 m/s. The length of time if firing is 5 milliseconds.
What is the magnitude of the force felt by the athlete?
Find out speed of the proton
the speed of light in a certain material is measured to be 2.2*10^8 m/s. what is the index of refraction of this material
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