Which of the following is best determined by applying the principles of relativity and uncertainty, rather than Newtonian physics?
A. The position of an electron
B. The length of an object at rest
C. The position of a bird flying overhead
D. The speed of a truck

the device is called “ rocket engine”

3. dark matter

empty space could also be a simple vacuum

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.