If an object travels 230 km in 4 hours, what was the speed of the object? (speed = distance/time)

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?

Porque crees que el agua no podia subir mas de 10 m de altura con ese tipo de bomba

Phase changes are chemical changes. true or false