"No esquema a barra homogênea BC tem 100 N de peso e o corpo P tem 500 N. Determine a intensidade da tração no fio AB e as componentes horizontal e vertical da força que a articulação exerce sobre a barra. Dados: sen30º = 1/2; cos30º = /2

good for her? ? where is the question?

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

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.