One lawn chair is made of aluminum and another is made of iron. both chairs are painted the same color. on a sunny day, which chair will be hottest to sit in? explain why.

On a sunny day, the chair with a lower heat capacity would be the hottest to sit in.  The SPECIFIC HEAT CAPACITY of a substance is the heat needed to raise the temperature of 1 kg of the substance by 1K. This means that the lower the heat capacity, the less energy needed to raise the temperature so the rate of increasing the temperature would be faster. Hoep this answers the question. Have a nice day.