If 10,000 J of energy is present at the `T 1` level, then what is the energy available at the `T_2` level ?

Options

A. 1000 J
B. 10 J
C. 100 J
D. 1 J

Answer

To solve the problem of energy transfer between trophic levels, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the 10% Law of Energy Transfer**:
The 10% law states that only 10% of the energy from one trophic level is transferred to the next trophic level. This means that when energy moves from one level to the next, a significant portion is lost, primarily as heat or used in metabolic processes.

2. **Identifying the Energy at T1**:
We are given that there is 10,000 Joules of energy at the T1 level (the first trophic level).

3. **Calculating the Energy at T2**:
To find the energy at the T2 level (the second trophic level), we apply the 10% rule:
\[ \text{Energy at T2} = \text{Energy at T1} \times 0.10 \]
Substituting the values:
\[ \text{Energy at T2} = 10,000 \, \text{J} \times 0.10 = 1,000 \, \text{J} \]

4. **Conclusion**:
Therefore, the energy available at the T2 level is 1,000 Joules.

### Final Answer:
The energy available at the T2 level is **1,000 Joules**.