1.

In two beakersA and B 50 ml water of about 70 degree celsius is taken then in beaker A 50 ml of water of about 30 degree Celsius is added and after 5 minutes in Beaker B 50 ml of water of about 30 degree Celsius is added What observe if the temperatures of both beakers recorded immediately why

Answer»

Hii DEAR,

# Answer-
BEAKER B will will be hotter than beaker A

# Explanation-
We all know that heat flows from higher temperature to lower temperature.
And rate if heat transfer depends on temperature difference.

# A)For beaker A,
We put 30°C water in 70°C water, the temperature difference is big so water will cool down immediately and for FIVE MINUTES it'll cool against difference with room temperature.

# B)For beaker B,
We wait for 5 minutes with 70°C water in room, so that'll cool it slowly. ALSO afer 5 minutes we'll add 30°C water to it, but temperature difference will be small so cooling will be pretty slow.

Thus if we measure temperature immediately after 5 minutes, beaker B will will be hotter than beaker A.

Thanks for asking...


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