Question

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Heat will flow from object A to object B if:

1 The molecular average kinetic energy of the two objects is the same.

2 The molecular average kinetic energy of A is higher than that of B.

3 The molecular average kinetic energy of B is higher than that of A.



I only


II only


I and III


III only

Answer 1

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Step-by-step explanation:

Answer 2

II only

Step-by-step explanation:

For heat to flow from one object to another, there must be a temperature difference between them. Temperature is a measure hotness or coldness of an object or a body.

An object consists of vibrating molecules, thus molecular kinetic energy. The measure of the average kinetic energy of an object is its temperature. Thus, when object A has higher temperature (hotter) than B, heat would flow from A to B.