How Do Temperature and Pressure Changes Affect Tire Pressure?

AI Thread Summary
Temperature and pressure changes significantly affect tire pressure, as demonstrated by a scenario involving a tire's gauge pressure at different altitudes. At the top of a mountain, the tire has a gauge pressure of 30 psi with an atmospheric pressure of 0.7 atm, not 1.7 atm. When the car descends to sea level, the atmospheric pressure increases to 1 atm, and the tire's temperature rises to 350 K. Despite the temperature increase, the gauge pressure of the tire remains the same due to the change in atmospheric pressure. Understanding the relationship between temperature, pressure, and altitude is crucial for accurate tire pressure assessments.
amandamarie29
Messages
4
Reaction score
0
1. A tire of an automobile has a gauge pressure of 30 psi at the top of a mountain, and the air temperature inside the tire is 300K. The atmospheric pressure at the top of the mountain is 1.7 atm. The car is driven down to sea level, where the atmospheric pressure is 1.0 atm and the air inside the tire is heated to 350 K. At sea level, assuming no leaks, the gauge pressure of the tire will be:

A) lower.
B the same.
C) higher.



2. I put C. higher because the pressure increases when temperature increases. But that was wrong and i don't have a clue why...
 
Physics news on Phys.org
Who makes up these problems?

Atmospheric pressure 1.7 atm @ top of a mountain and 1 atm @ Sea Level ? !
 
Well, are you sure that atmospheric pressure at the top of the mountain isn't 0,7 atm, rather than 1.7 atm.

That would make a BIG difference.
 
oh yes.. its 0.7 atm.. sorry typo =)
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

What is the relationship between tire size and pressure changes?
Replies
13
Views
983
What does atmospheric pressure have to do with the gauge pressure?
Replies
3
Views
1K
How do I calculate the gauge pressure?
Replies
2
Views
5K
Energy of a water tank with compressed air
Replies
5
Views
1K
How many air molecules are there inside the tire?
Replies
3
Views
4K
Chimney effect and pressure difference
Replies
10
Views
2K
Gauge pressure of water oozing out of a pipe
Replies
11
Views
2K
How to Solve an Ideal Gas Equation Problem with Changing Tire Pressures?
Replies
7
Views
2K
Tire pressure changing due to temperature
Replies
25
Views
10K
Determining pressure at various altitudes using integration
Replies
5
Views
2K

Hot Threads

Recent Insights

Back
Top