Two balls are dropped from the same height of 9.80 m. They strike the ground at the same time. Ball 1 has a mass of 3.45 kg, while ball 2 has a mass of 5.43 kg. If gravity is
the only force acting on the balls, calculate the momentum change of each ball.

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Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.