What is comparative planetology and why is it useful to astronomers?

the comparison and  contrasting the feature,  properties and behaviors of the different  planetary objects and the diverse worlds.

comprehend theories of the formation, origin of the different planets

Explanation:

The comparative planetology is the space science that deals with study of the the comparison and  contrasting the feature,  properties and behaviors of the different  planetary objects and the diverse worlds.

The comparative planetology  helps the astronomers to comprehend theories of the formation, origin of the different planets.

given data:

determine the horse power (h.p) = ?

force applied to move the box(f) = 10 pounds,

box lifted from a distance         (d) = 3 feet

time taken to lift                         (t) = 10 sec,

the horse power is defined as amount of work required to move a load. the horse power is equal to 550 foot-pound per second

                  1 h.p   = 550 foot-pound/second

it can also be defined as the the load that need to be move a body for certain distance in a certain amount of time.

mathematically,

                      h.p = (force × distance)/ time

                            = (10 × 3)/ 10

                            = 30/10

                            = 3 foot -pound/sec

hence, the horse power is needed to move the box is 3 foot-pound/second

important note: 1 h.p = 550 foot-pound/second = 746 watts

a.) is the correct answer.

explanation: