using the ideal gas law or the combined gas law,why does the air pressure inside the tires on my motorcycle increases during the time I am riding it. Consider what factors are being kept constant and what are changing and how. What if I weigh alot?

Answer 1

PV/T = k = constant
Volume of the tires are essentially constant although they can give a little. Friction between tires and pavement causes heat to be generated. If V is to stay essentially the same, then P must go up if T goes up in order keep k the same.
The heavier the load the more work the motorcycle must do to haul the load and that causes heat to be generated.