Ahot iron ball is dropped into 200.0 g of cool water. the water temperature increases by 2.0 c and the temperature of the ball decreases by 18.6 c. what is the mass of the ball? waters specific heat is 4184 (j/kg•c)

0.2 KG, just search the question and it's on yahoo answers 

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.