Mutations that neither benefit nor harm the organisms have blanks effect on the organisms survival

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

Most short-period comets do not have randomly oriented orbits because

An impulse is the product of the on an object and time during which it is applied