What is the kinetic energy of a 10 g bullet moving at 300 m/s?

          Kinetic energy  =  (1/2) (mass) (speed)²

mass of the bullet  =  10 grams  =  0.01 kilogram
speed of the bullet = 300 m/s

          Kinetic energy = (1/2) (0.01 kg) (300 m/s)²

                                =   (0.005 kg)  (90,000 m²/s²)

                                =    (0.005 x 90,000)  kg-m²/s²

                                =         450 kg-m²/s²

                                =         450 joules