Final answer:
The correct internal temperature for cooked filet of fish is 145°F, and the temperature of oil in a pan that is in thermal equilibrium with a hot plate at 150°C would also be 150°C.
Step-by-step explanation:
When you cook a filet of fish, the internal temperature you're aiming to reach is 145°F to ensure the fish is safe to eat and properly cooked. This is in accordance with the guidelines set by the U.S. Food and Drug Administration (FDA). It's important to use a food thermometer to check the internal temperature of the fish to make sure it has reached this temperature. For the question concerning the oil in a pan that is in thermal equilibrium with the hot plate, the correct answer would be that the temperature of the oil is also 150°C. When two substances are in thermal equilibrium, they are at the same temperature, which means there is no net heat flow between them.