Final answer:
The subject involves Business and Physics principles regarding the potential impact of thermal expansion on a land measurement in Hong Kong, affecting the property's total price.
Step-by-step explanation:
The subject in question pertains to the Business aspect of determining the potential price change in a real estate transaction in Hong Kong due to steel tape measure expansion on a hot day, which directly relates to Physics concepts. It involves an understanding of thermal expansion, measurement accuracy, and its financial implications on the property value. As temperature increases, the steel tape will expand, causing a potential overestimation of the land's dimensions. To calculate the price change, one would need to know the coefficient of thermal expansion for steel and the exact temperature increase to calculate the new dimensions potentially recorded by the stretched tape. However, with a 20 m x 30 m plot and a price of $60,000 per square meter, any change in dimensions due to thermal expansion is likely to have a significant monetary impact.