Question

in two beakers (A and B)50ml water of about 70 degree celsius each is taken beaker A a 50 ml of water about 30 degree Celsius added in after 5 minutes in beaker B 50 ml of water of about 30 degree Celsius is added what would observe in the temperatures of both recorded immediately and why ​

Answer 1

Rate of heat flow from higher temperature to lower temperature.  Rate of heat of transfer  between two hot or cold body depends upon the temperature difference between them. That mean higher the difference higher will be heat transfer rate from hotter to colder body.

In Beaker A Temperature difference is 20C But Beaker B is placed in open area so it wil cool down itself in 5 minute and when we add water the temperature difference would be less than 20C .

Beaker A will cool down itself rather than Beaker B because of higher temperature difference. So temperature of B will be greater than A.