The International Space Station (ISS) orbits Earth at an altitude of 360 km above Earth's surface. The acceleration required keep the ISS in orbit along a circular path is provided by Earth's gravity, which is directed toward the center of Earth and hence toward the center of the orbit. Earth's gravitational pull decreases gradually with altitude, so the acceleration due to gravity that is exerted on the ISS is only 8.78 m/s. (a) What is the orbital speed of the ISS in meters per second?

(b) Kilometers per hour?

(c) And miles per hour?

How long (in minutes) does it take the ISS to complete an orbit? (Note that the radius of Earth is 6378 km].

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

Sorry my friend i don't know the answer. i am just in 6th

One splits the atoms and molecules  the other combines them