What type of systes are the following system?
Hot tea placed in a cup.

Explanation

To determine the type of system represented by hot tea placed in a cup, we can analyze the characteristics of the system in terms of energy and matter exchange. Here’s a step-by-step solution:

### Step 1: Identify the System
- The system in question is the hot tea contained within a cup.

### Step 2: Analyze Matter Exchange
- In this scenario, the cup is rigid and sealed at the bottom, meaning that the tea cannot escape from the cup. Therefore, there is no exchange of matter between the tea and the surroundings.

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