A 0.34 kg iron horseshoe that is initially at 616 ?c is, Ask an Expert

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Q1. A 5.00 kg model rocket is launched, expelling 61.00 g of burned fuel from its exhaust at a speed of 575 m/s. What is the velocity of the rocket after fuel has burned? Hint: Ignore the external forces of gravity and air resistance.

Q2. A 0.34 kg iron horseshoe that is initially at 616 ?C is dropped into a bucket containing 25 kg of water at 28 ?C. What is the final equilibrium temperature? Avoid any energy transfer to or from the surroundings and assume the specific heat of iron is 448 J/kg ? C. The specific heat of water is 4185 J/kg •? C.

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