Question

40 tom prepared a turkey at room temperature and heated the oven to 160 °c. he placed the turkey in the oven to cook. after the turkey was cooked for two hours, he inserted a thermometer into the turkey to check the temperature as shown. (a) state the temperature shown on the thermometer. 1 (b) state why the temperature of the turkey is not 160 °c even after two hours in the oven. 1

Explanation:

Part (a)

To determine the temperature on the thermometer, we look at the scale. The thermometer is marked in °C, and the pointer is at 70 °C (checking the scale: the markings are 50, 60, 70, 80, 90, 100, and the pointer aligns with 70).

Heat transfer between the oven (at 160 °C) and the turkey occurs until thermal equilibrium, but the turkey has a lower temperature initially. Also, heat transfer takes time (conduction, convection, radiation), and the turkey's mass/thermal properties mean it doesn't reach oven temp immediately. Another reason: the turkey is a conductor/has thermal inertia, so heat takes time to spread, and it might not reach the oven's temperature even after 2 hours as heat transfer is gradual.

Answer:

70 °C

Part (b)