Final answer:
The effect of an oxygen tank explosion in space is a reduction in available oxygen, which can be life-threatening. The lack of gravity in space can make the situation more challenging as objects and people can float freely.
Step-by-step explanation:
When one of the oxygen tanks in the service module of a spacecraft explodes in space, the effect is a reduction in the available oxygen for the astronauts on board. This can be a life-threatening situation as it can lead to a shortage of breathable air. In order to survive, the astronauts must rely on the available resources, such as emergency oxygen supplies or returning to Earth if possible.
The lack of gravity or apparent weightlessness in space can make the situation more challenging. Without gravity, the movement of objects and people is not restricted, and they can float freely. This can make it difficult to control movement and perform tasks. However, astronauts are trained to deal with these conditions and make use of restraints, tools, and the spacecraft's structure to move around and perform their duties.
Overall, an explosion in space can have serious consequences and requires immediate response and intervention from the astronauts to ensure their safety and survival.