The mass of pluto was not known until it was discovered tohave
a moon. explain how this discovery enabled an estimate ofpluto's
mass.

M is mass of pluto

Explanation:

we know that gravitational force between moon and Pluto can be derived by using the given relation

here

G-gravitational constant =

M- mass of pluto

m -  mass of moon

r - radius of moon - 1737.1 km

F_{gravitational} = centripetal force

where

- angular speed of moon

plugging all value in the above equation to get the mass of Pluto

M is mass of pluto

he made 11 calls in one day

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.