For the following practice, type in the correct form of IR in the first box and in the 2nd box, type in
al
a la
a los
a las
Example:
Yo voy a la biblioteca.

Yo__ __ restaurante con mi familia.

Mis amigos y yo__ __ cine.

Ud.__ __museos.

Yo__ __ teatro esta noche.

Andrés__ __ banco con su papá.

Vosotros__ __ oficina.

Uds.__ __tiendas.

Los estudiantes__ __ fiesta.

María y tú__ __ escuela hoy.

La amiga de Beto__ __médico hoy.

answer: pop out i think

explanation:

answer:

because the gravitational attraction of our sun for the earth is the centripetal force causing the earth's circular motion around the sun, we can use netwon's law of universal gravitation to find the mass of the sun without ever actually visiting the sun. this is the same technique you would use to determine the mass of cygnus x-1 with a probe. the earth, orbiting the sun, plays the same role as the probe sent to orbit cygnus x-1.

f(force of gravity) = f(centripetal force)

explanation: