Question

why does waters high specific heat make it a good coolant for car radiators?

Explanation:

Specific heat is the heat needed to raise a substance’s temperature by 1°C. Water has a high specific heat, meaning it absorbs a large amount of heat from the car engine (or releases a lot when cooling) with only a small temperature change. This allows it to effectively absorb engine heat, preventing overheating, and then dissipate that heat through the radiator.

Answer:

Water has a high specific heat capacity, so it can absorb a large amount of heat from the car engine (while undergoing a relatively small temperature increase) and then release that heat when cooled in the radiator, effectively preventing the engine from overheating.