8. (a) A baseball weighs 145.4 g. What is the kinetic energy, in joules, of this...

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8. (a) A baseball weighs 145.4 g. What is the kinetic energy, in joules, of this baseball when it is thrown by a major league pitcher at 150 km/h? (b) By what factor will the kinetic energy change if the speed of the baseball is decreased to 90 km/h? (c) What happens to the kinetic energy when the baseball is caught by the catcher? Is it converted mostly to heat or to some form of potential energy? 9. . Perform the following conversions: (a) 5.00 days to s, (b) 0.0550 mi to m, (c) $1.89/gal to dollars per liter, (d) 0.510 in./ms to km/hr, (e) 22.50 gal/min to L/s, (f) 0.02500 ft to cm. Carry out the following conversions: (a) 0.105 in. to mm, (b) 0.650 qt to mL, (c) 8.75 m/s to km/hr, (d) 1.955 m to yd (e) $3.99/lb to dollars per kg, (f) 8.75 lb/ft to g/mL. 8. (a) A baseball weighs 145.4 g. What is the kinetic energy, in joules, of this baseball when it is thrown by a major league pitcher at 150 km/h? (b) By what factor will the kinetic energy change if the speed of the baseball is decreased to 90 km/h? (c) What happens to the kinetic energy when the baseball is caught by the catcher? Is it converted mostly to heat or to some form of potential energy? 9. . Perform the following conversions: (a) 5.00 days to s, (b) 0.0550 mi to m, (c) $1.89/gal to dollars per liter, (d) 0.510 in./ms to km/hr, (e) 22.50 gal/min to L/s, (f) 0.02500 ft to cm. Carry out the following conversions: (a) 0.105 in. to mm, (b) 0.650 qt to mL, (c) 8.75 m/s to km/hr, (d) 1.955 m to yd (e) $3.99/lb to dollars per kg, (f) 8.75 lb/ft to g/mL.