Matteo guarda la pioggia fuori 3 punti dal finestrino del treno mentre
è fermo in stazione. Le gocce
cadono verticali sul finestrino
alla velocità di 5.0 m/s. Quando
il treno si muove a velocità
costante, le gocce cadono di
taglio e formano un angolo di
25° sul finestrino. Quale è la
velocità del treno?
5,0 m/s
2,3 m/s
Ο Ο Ο Ο
O m
1,5 m/s
O 3,7 m/s

see earlier answer

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

wavelegth as in spectrum red oygbiv

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.