Question

a kettle of boiling water cools in a warm kitchen. x = the time that has elapsed in minutes. y = the temperature of the kettle in degrees celsius. a b c d

Explanation:

Step1: Understand heat - transfer principle

According to Newton's law of cooling, the rate of change of the temperature of an object is proportional to the difference in temperature between the object and its surroundings. A kettle of boiling water in a warm kitchen will cool down over time.

Step2: Analyze each graph

• Graph A shows the temperature increasing over time, which is incorrect as the kettle is cooling.
• Graph B shows a non - monotonic temperature change, which is not in line with Newton's law of cooling for a simple cooling process in a constant - temperature environment.
• Graph C shows a periodic temperature change, which is not applicable here.
• Graph D shows the temperature of the kettle decreasing over time, which is consistent with the cooling process of the kettle of boiling water in a warm kitchen.

Answer:

D