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7) on places of hot climate it is advised.........white because light colours absorb less heat and reflect more light than darker colours thus keeping the house cool.
8) (d) between 30 Degree and 50 Degree celcius
It is because heat always flows from a higher temperature to a lower temperature and does not stop flowing until both the bodies are of equal temperature. so when water of 50 Degree celcius is mixed with water of 30 Degree celcius Heat will decrease from the 50 degree celcius and increase from the 30 Degree celcius.
Therefore the temperature of the mixture will be less than 50 Degree celcius but more than 30 Degree celcius.
Have a good day!!!
8) (d) between 30 Degree and 50 Degree celcius
It is because heat always flows from a higher temperature to a lower temperature and does not stop flowing until both the bodies are of equal temperature. so when water of 50 Degree celcius is mixed with water of 30 Degree celcius Heat will decrease from the 50 degree celcius and increase from the 30 Degree celcius.
Therefore the temperature of the mixture will be less than 50 Degree celcius but more than 30 Degree celcius.
Have a good day!!!
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