What is Conservation of Momentum? I’ll give brainliest :D pls explain in it in a way so that my fried brain can understand it :( thanks !!

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?

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.