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A property of water called specific heat is high . this is because water has it takes time to warm up.
Time to warm up
Water needs a lot more heat to really start heating up: to raise the temperature of 1 gram of water by 1 degree Celsius, 4.186 joules of energy are needed, while for the same amount of air, 1.005 joules are needed and for the only 0.800 joule.
With this information, we can conclude that water takes longer than other elements to heat up.
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Because of the high heat capacity of water, the water of the lake was still cool from being frozen in the winter.
What is heat capacity?
Heat capacity is the amount of heat required to raise a unit mass of a substance by 1°C.
Water has a very high heat capacity of 4200 Jkg/K.
Therefore, a takes a long time to heat a unit mass of water.
Similarly, it take a long time for water to lose all of its heat.
Therefore, due to the high heat capacity of water, the water of the lake was still cool from being frozen in the winter.
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