The pressure and temperature inside a bike tire is 10 atm and 10 K

respectively. What will the pressure become in the tire when the temperature is increased 20 K?

5 atm

Explanation:

Gay-Lussac's Law states that pressure of a given amount of gas held at constant volume is directly proportional to the Kelvin temperature.

P1 / T1 = P2 / T2

Plug the information given in and you get

(10atm) (10 K) = (P2) (20K)

Divide both sides by 20 K and you get the unknown pressure which is 5 atm.