An engine has an efficiency of 64% and producess 5500 J of work .Determine (a) the input heat .

Explanation

To solve the problem, we need to determine the input heat (QH) for an engine that has an efficiency of 64% and produces 5500 J of work.

### Step-by-Step Solution:

1. **Understand the Efficiency Formula**:
The efficiency (η) of a heat engine is defined as the ratio of the work output (W) to the heat input (QH):
\[
\eta = \frac{W}{QH}
...