A tire contains air at a gauge pressure of 4.86x10^4 Pa at a temperature of 25*C. After nightfall the temperature drops to -10*C. Find the new gauge pressure in the tire. Pa
Pa_i/T_i = Pa_f/T_f
T = T_c + 273
The Attempt at a Solution
4.86x10^4/298 = Pa_f/263
Pa_f = 4.29x10^4
This is incorrect. I read the book and it said something about absolute pressure - atomospheric pressure (1.01x10^5). The problem i have is how do i find the absolute pressure? Also am i going into the right approach on solving the problem?
Am i completely off on what I am doing. Mainly i need help on figuring out how to get the absolute pressure.