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luda_lava [24]
2 years ago
11

A mass of (200 g) of hot water at (75.0°C) is mixed with cold water of mass M at (5.0°C). The final temperature of the mixture i

s (25.0°C). What is the mass of the cold water (M)?
Physics
1 answer:
MArishka [77]2 years ago
3 0

Answer:

500 g

Explanation:

Specific heat of water = 1 j/g-c

Heat given up by hot water = 200(75-25)(1) = 10 000 j

this is the heat GAINED by the cold water

10000 j =  x ( 25 -5)(1)  

          x =500g

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According to the Work-Energy Theorem, the work done on an object is equal to the change in the kinetic energy of the object:

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