Question1a rifle is expected horizontally at a target 28m

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Question1

A rifle is expected horizontally at a target 28m away. The bullet hits the target 2.7 cm below the aiming point. Neglect air resistance. What is the bullet's time of flight? And what is its muzzle velocity?

Question2

Air has an average density of 1.29kg/m^3 near the surface of the earth: (a) research air and find out what percent of it is oxygen? If each breath from a person takes an average of 1/2 L of air, what mass, in grams, does a person breathe in in a day? If the air was to be stored uncompressed in a spherical tank, what would be radius of the tank?

Reference no: EM13350625

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