Which of the following properties can be inferred from the star's orbital period?

a. the planet's orbital radius

b. the planet's mass both

c. the planet's orbital radius and its mass

d. neither the planet's orbital radius nor its mass

You observe that an extra solar planet blocks 4% of its star light. knowing that the star's radius is 8x105 km, what is the radius of the planet?

Recent estimates indicate that more than half of the population of Algeria, Libya, and Tunisia live

Which of the following is not an example of a historically ethnically diverse country in Europe A. Macedonia B. Switzerland C. Bosnia and Herzegovina B. Ireland

In which sentence from Black hole beginnings is a cause underlined

Which of the following is NOT true about Guinea worm disease? It infects people who drink water contaminated with copepods carrying worm larvae. It is spread by people with active Guinea worm infections entering communal water.

Why are farmers today less sucessful than the inca

Which of the statements below is not a characteristic of economically developed nations?

What is a most dangerous side effect of hurricanes in the Central American region

What is an effect of continental shifting on local environments?

The present international treaty regarding Antarctica: Options: A. Divides the land among the twelve nations claiming rights to it. B. Allocates petroleum and mineral rights among the twelve original treaty signers and eleven other nations. C.