Helium has the lowest boiling point of the elements. The slightest change in temp can cause it to vaporize and expand. To prevent pressure explosions, a line from the tank has a "burst disk" in case a of sudden pressure increse. then the diaphragm would rupture and release the gas before pressure was too high.

This is an example of which physics law? Charles? Boyle? Ideal?

I think possibly Charles because as it warmed up due to the fire, the pressure expanded and it exploded. Temp increase, pressure increase. please help

Based on the information provided, the scenario you described is an example of Boyle's law, not Charles's law.

Boyle's law states that at a constant temperature, the pressure and volume of a gas are inversely proportional. In other words, if the volume of a gas decreases, the pressure increases, and if the volume increases, the pressure decreases, as long as the temperature remains constant.

In the case of the helium tank, when the temperature increased due to the fire, it caused the helium gas inside to vaporize and expand. As the volume of gas increased, the pressure would also increase according to Boyle's law. If the pressure continued to rise without any means of release, it could potentially lead to a pressure explosion.

To prevent this, a burst disk or diaphragm was incorporated into the system. When the pressure inside the tank reaches a certain point, the diaphragm would rupture and release the gas before the pressure became too high, avoiding a dangerous situation. Therefore, this example is an application of Boyle's law, which deals with the relationship between pressure and volume in a gas.