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Beaker B would be more warmer than beaker A
Reason:
As we know that heat transfers from higher temperature to lesser temperature.
For Beaker A,
As we pour 30°C water in 70°C water, the temperature contrast is enormous so water will cool instantly and for five minutes it'll cool against distinction with room temperature.
For Beaker B,
After waiting for 5 minutes with 70°C water in room, so that will cool it gradually. Additionally after 5 minutes we will add 30°C water to it, however temperature distinction will be little so cooling will be truly moderate.
In this manner on the off chance that we measure temperature quickly following 5 minutes, beaker B will be more warmer than A.
Reason:
As we know that heat transfers from higher temperature to lesser temperature.
For Beaker A,
As we pour 30°C water in 70°C water, the temperature contrast is enormous so water will cool instantly and for five minutes it'll cool against distinction with room temperature.
For Beaker B,
After waiting for 5 minutes with 70°C water in room, so that will cool it gradually. Additionally after 5 minutes we will add 30°C water to it, however temperature distinction will be little so cooling will be truly moderate.
In this manner on the off chance that we measure temperature quickly following 5 minutes, beaker B will be more warmer than A.
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