Question

two cars with identical engines overheated. a mechanic opened the hood of one car and left the hood of the other car closed. this table shows how the temperature of each engine changed over 10 minutes.

engine	initial temperature (°c)	final temperature (°c)
engine in the car with the open hood	109	89

the next time the mechanic works with an overheated engine, she wants the engine to cool off quickly. what should she do to maximize the rate of thermal energy transfer out of the engine?

leave the hood of the car closed

leave the hood of the car open

either; the rate of thermal energy transfer is the same whether the hood is open or closed

Explanation:

From the table, the engine with the open - hood cooled from 109°C to 89°C in 10 minutes, while the engine with the closed - hood cooled from 107°C to 97°C in 10 minutes. An open hood allows for better air circulation around the engine, which increases the rate of heat transfer (convection) from the engine to the surrounding environment.

Answer:

leave the hood of the car open