How does a model demonstrate earths motion around the sun

Explain the value of statistics and other data to positive economics and to normative economics

Is a state government creates a new tax to fund schools a example of checks and balances

Tides are caused by a differences in the gravitational force of the sun at different points on earth. differences in the gravitational force of the moon at different points on earth differences in earth’s gravitational field strength at different points on earth’s surfac fluctuations in the gravitational attraction between earth and the moon.