A chip has a thermal resistance of $0.007$ K/J s and thermal capacitance of $1.6$ J/K. You give it an impulse of heat equal to $100$ J. How long does it take for the chip to cool to within $10\%$ of the ambient temperature?
I understand that I have to implement Newton's Law of Cooling, but I can't seem to grasp how I can find the ambient temperature nor the initial temperature.
Any and all help is greatly appreciated.