1.It takes light 8 minutes and 20 seconds to reach the Earthfrom the Sun. The speed of light in a vacuum is a constant at3×108??. Assume Earth’s orbit is circular.a.Whatis the distancefrom the Sun to the Earth?b.Calculate the mass of the Sun
2.This past week SpaceX and NASA teamed up to launch twoastronauts to theInternational Space Station (ISS)from CapeCanaveral for the first time since 2011.The ISShas a massof4.08×105??and orbits the Earth on acircular path at an altitudeof 400km (note that the radius of Earth is 6000 kmand mass of theEarth is 6×1024??).a.How fast is the ISS moving?b.How many orbitsdoes the ISScomplete in one day?c.Determine the work required toput the ISS into this orbit assuming that it started from rest atthe surface of the earth.
