Sobre una superficie horizontal lisa setienen dos esferas que se mueven conrapideces de 4 m/s y 3 m/s, en la formacomo se indica. Determinar el tiempo quetranscurre desde el instante que se indicaen la figura, hasta el instante en que ladistancia que los separa sea mínima.

i think the answer is a, hope this : )

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.