A new dwarf planet was observed recently in the asteroid belt between Mars and Jupiter. It has an orbital period of 7.93 E 7 s. Its average distance from the sun is 2.77 E 11 m. What is its ratio from the law of harmonies? (1 point) 2.96 E−19 s2/m3

3.76 E−19 s2/m3

4.65 E−19 s2/m3

6.82 E−19 s2/m3

G = 6.67 E−11 N*m2/kg2, mass of the Earth is 5.98 E 24 kg, mass of the ISS is 4.20 E 5 kg, average Earth-ISS distance is 6.78 E 6 m. If the gravitational force between the Earth and the international Space Station is 3.64 E 6 N, what is the average speed of the ISS as it orbits the Earth? (1 point)

5200 m/s

6500 m/s

7700 m/s

9100 m/s

At aphelion, Mars is 120% of the Mars-sun distance at perihelion. Which of the following statements would be correct? (1 point)

At aphelion, because the gravitational attraction is greater, the speed of Mars is higher.

At aphelion, because the gravitational attraction is lower, the speed of Mars is lower.

At perihelion, because the gravitational attraction is lower, the speed of Mars is higher.

At perihelion, because the gravitational attraction is higher, the speed of Mars is lower.