De entre las siguientes medidas: La longitud de la pared del salón de tu casa
La superficie de la mesa
El volumen de tu ordenador
La temperatura de tu cuarto
La velocidad de tu bicicleta
La masa de una barra de pan
¿Cuáles son directas y cuáles indirectas?

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

neither accurate nor precise.

because if the tool that you are using is not balanced it there would be false mass.

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.