A 30.0 g sample of aluminum is heated to 100°C before being placed in 225.0mL of water. The metal-water combination reaches a final temperature of 13°C. The specific heat capacity of aluminum is 9.2 x 10^2 J/kg°C. What was the initial temperature of the water? Please answer quick!!

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000