- #1

BunDa4Th

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## Homework Statement

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

## Homework Equations

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?

or

Am i completely off on what I am doing. Mainly i need help on figuring out how to get the absolute pressure.