I don't know what's wrong with me, and I'm ashame of myself, but could you please help me to solve this problem: there is 1 kg of water in the basin and it's(water's) temperature is 20 degrees. an aluminium object with mass of 0,5 kg, thermal capacity of 0,2 and temperature of 75 degrees. after a minute water became 2 degrees warmer. when the difference between water and the object will be less than 1 degree?
I know this cooling equation but can't see how to use it in this situation.