Final answer:
Flashing warning lights and sirens are emergency equipment used to warn of a stopped vehicle with explosives.
Step-by-step explanation:
The emergency equipment that may be used to warn of a stopped vehicle containing explosives is flashing warning lights and sirens. These are commonly seen on emergency vehicles such as police cars, fire trucks, and ambulances. When these lights and sirens are activated, they alert other drivers and pedestrians to the presence of a stopped vehicle with explosives, allowing them to take necessary precautions.