Onsider two comets orbiting the Sun. They both have the same semi-major axes, a = 50 AU, but Comet 1 has an eccentricity e=0 and Comet 2 has an eccentricity e=0.5. How do the periods of the two comets compare?

How do oceanographers measure the salinity of ocean water?

Which characteristics are true of the arabian desert? multiple answers choose all answers that are correct. a. is mostly below sea level b. covers almost the entire arabian peninsula c. contains the largest sand sea in the world d. has very few people living there

Which barrier to economic development is shown in the following examples?