The earth revolves around the sun once a year at an average distance of 1.50×1011m. find the orbital radius that corresponds to a "year" of 180 day

Explanation:

We can solve the problem by using Kepler's third law, which states that the ratio between the cube of the orbital radius and the square of the orbital period is constant for every object orbiting the Sun. So we can write

where

is the distance of the new object from the sun (orbital radius)

is the orbital period of the object

is the orbital radius of the Earth

is the orbital period the Earth

Solving the equation for , we find

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

see earlier answer