Final answer:
True or false questions pertaining to physics were addressed: solar sails can be propelled by solar wind particles; an external force is necessary to move an object in outer space; and light, without rest mass, is affected by gravity. These statements are all true.
Step-by-step explanation:
The student's question 'GPS May be Suspended without Warning' refers to the functionality and reliability of Global Positioning System technology. To address the specifics provided, I will explain three different true or false physics concepts:
- Particles within the solar wind can indeed propel a solar sail craft. This is true. The momentum transfer from solar wind particles to the sail is the basis for this propulsion method.
- The need for an external force to set a stationary object in motion in outer space, away from all gravitational influences and atmospheric friction, is true. According to Newton's first law of motion, an object at rest will stay at rest unless acted upon by an external force.
- Light, which behaves as both a particle and a wave, is affected by gravity even though it has no rest mass. This is true. Einstein's theory of general relativity explains that gravity can bend the path of light due to the curvature of space-time.
Note that the other statements provided are not evaluated as they were not part of the original student question.