Who is the chief justice of the united states? choose one: john roberts ruth bader ginsburg antonin scalia clarence thomas

John Roberts

Explanation:

John Roberts is the current Chief Justice of the United States. He became the 17th chief justice after the Senate voted 78-22 to approve his nomination on Sept. 29, 2005.  

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: