You live in a remote cabin at ground level. You have a broken thermometer, but you know your barometer works. When you arrive at the cabin you knew the temperature was 10 C. When you arrived you measured the pressure to be 101 kPa at ground level, and 90.9 kPa at an altitude of 1km Off the ground (both at 10 C) . Today you measured the pressure to be 101 kPa at the ground, and 89.9 kPa at an altitude of 1km off the ground. What is the temperature today ( it was the same at both altitudes)