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47. Calculate the kinetic energies of (a) a 2000.0-kg automobile moving at 100.0 km/h; (b) an 80.-kg
runner sprinting at 10. m/s; and (c) a 9.1 x 10-31 -kg electron moving at 2.0 × 107 m/s.
Transcribed Image Text:47. Calculate the kinetic energies of (a) a 2000.0-kg automobile moving at 100.0 km/h; (b) an 80.-kg runner sprinting at 10. m/s; and (c) a 9.1 x 10-31 -kg electron moving at 2.0 × 107 m/s.
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