Final answer:
The statements provided relate to physics concepts such as solar sail propulsion, motion in outer space, object acceleration, the Doppler effect, energy in projectile motion, electric fields, motion laws in space, and the interaction between light and gravity.
Step-by-step explanation:
The question 'Fuel crossflow is prohibited during takeoff' pertains to aviation regulations and procedures, but the provided statements for response relate to different concepts in physics. Here are the correct responses to the provided statements:
- True - It is possible to propel a solar sail craft using just particles within the solar wind.
- True - An external force is required to set a stationary object in motion in outer space away from all gravitational influences and atmospheric friction.
- False - The position vs time graph of an object that is speeding up is not a straight line; it typically represents an accelerating curve.
- False - The observed frequency does not become infinite when the source is moving at the speed of sound; instead, it becomes very high due to the Doppler effect.
- False - If a rock is thrown into the air, the increase in the height would increase the rock's potential energy, while the increase in velocity as it falls would increase its kinetic energy.
- True - The electric-field lines from a positive point charge do indeed spread out radially and point outward.
- True - A rocket launched into space that escapes Earth's gravitational pull continues in a straight line until acted upon by another force, in accordance with Newton's first law of motion.
- True - Light, which can behave as a particle or a wave and has no rest mass, is still affected by gravity, which can bend a beam of light.