The speed of light in space — the ultimate speed limit of the Universe — is 9.45 x 10^12 km/yr. What fraction of the speed of light is your interstellar travel velocity from 3.19 x 10^8 km/yr. Show work and give the answer as a decimal

The air that we breath is made mostly of which gaseous molecule

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.