A note is played on a saxophone with a frequency of 258 Hz while a nearby piano plays a note with a frequency of 261 Hz. A pattern of regularly alternating louder and softer tones
("beats") is heard. Which of the following explains this?
A. Reflection
B. Interference
C. Resonance
D. Absorption

if they have a finite resultant

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

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.