Solving a Physics Quiz: Calculate the Temperature Rise

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To solve the physics quiz problem, the temperature rise of both the rock and the water must be calculated using the principles of energy transfer. When the rock is dropped, it converts potential energy into kinetic energy upon impact, which then transfers heat to the water. The specific heats of the rock and water are crucial in determining how much each will heat up based on their masses and the energy transferred. The final temperature rise can be found using the formula Q = mcΔT, where Q is the heat transferred, m is mass, c is specific heat, and ΔT is the change in temperature. Understanding these concepts will clarify how the energy from the rock affects the water's temperature.
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My Physics teacher gave us a quiz problem and I don't understand it really how he got his answer. Can you please give me your answer and an explanation for the answer Thanks. Here is the question:

A .5 kg rock is dropped from a height of 20 meters into a pail containing .6 kg of water. The rock has a specific heat of 1480 and the water has a specific heat of 4186. What is the is the rise in temperature of the rock and water ?
 
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What do you think happened when the rock dropped??
 
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