*Question T5B02:
Which is equal to 1,500,000 hertz?*  

*Correct Answer is  A: 1500 kHz*  

### AI Response: (may contain errors)  

To determine which option is equal to 1,500,000 hertz, we need to convert hertz to kilohertz (kHz), megahertz (MHz), and gigahertz (GHz).

1. **Understanding the Units**:
   - 1 kHz = $1,000$ Hz
   - 1 MHz = $1,000,000$ Hz
   - 1 GHz = $1,000,000,000$ Hz

2. **Converting 1,500,000 Hz**:
   - To convert hertz to kilohertz, we divide by $1,000$:
     $$1,500,000 \text{ Hz} = \frac{1,500,000}{1,000} \text{ kHz} = 1,500 \text{ kHz}$$
   - To convert hertz to megahertz, we divide by $1,000,000$:
     $$1,500,000 \text{ Hz} = \frac{1,500,000}{1,000,000} \text{ MHz} = 1.5 \text{ MHz}$$
   - To convert hertz to gigahertz, we divide by $1,000,000,000$:
     $$1,500,000 \text{ Hz} = \frac{1,500,000}{1,000,000,000} \text{ GHz} = 0.0015 \text{ GHz}$$

3. **Evaluating the Choices**:
   - **A: 1500 kHz**: This is correct because $1,500,000$ Hz equals $1,500$ kHz.
   - **B: 1500 MHz**: This is incorrect because $1,500$ MHz equals $1,500,000,000$ Hz, which is much larger than $1,500,000$ Hz.
   - **C: 15 GHz**: This is incorrect because $15$ GHz equals $15,000,000,000$ Hz, which is also much larger than $1,500,000$ Hz.
   - **D: 150 kHz**: This is incorrect because $150$ kHz equals $150,000$ Hz, which is smaller than $1,500,000$ Hz.

In summary, the correct answer is **A: 1500 kHz** because it accurately represents the conversion of 1,500,000 Hz into kilohertz. The other options are incorrect due to their respective conversions being either too large or too small.